Wednesday, January 08, 2025

Books That Enlarged My Outlook in 2024

Thanks to an annual challenge published by the reading challenge group, The 52 Book Club, I have started reading a LOT more in the last several years.  While most of the books I've read have been fiction, I have also read some interesting non-fiction along the way - and, of course, some of my favorite non-fiction books have to do with the environment,  I thought I'd share my favorite environmental reads from 2024.


The Nation of Plants, by Stefano Mancuso, Other Press LLC, New York, 2019/2021.  

    Sometimes I read a book that completely shifts a facet of how I understand the world.  This small book created such a shift in me.  I've always considered animals to be "more advanced" than plants, and thus "more important" somehow.  However, recent research has certainly been expanding our understanding of plants significantly.  Going a step further, this book posits, successfully in my view, that plants are by far the most important living beings on Earth.  "We exist thanks to plants, and we will continue to be able to exist only in their company.  It behooves us to keep this idea clear at all times."  Mancuso starts from that premise and goes on to create a Constitution for The Nation of Plants, imaginatively raising environmental truths to the level of international law.  (Note: Mancuso is a plant neurobiologist at the University of Florence, Italy.)

What did I gain from reading this book?  Reading this book changed my fundamental understanding of the importance of plants compared to animals.


The Insect Crisis, by Oliver Milman, W. W. Norton & Company, 2022.  

    Starting with a brief vision of what would (will?) happen to humans if all insects disappear, Milman goes on to look at the research studies behind recent dire headlines about the significant insect declines being observed.  He shares stories and studies from across the planet.  Then Milman examines the threats that are causing those insect declines, from farming practices to light pollution to global warming, pointing out that many of these threats are voluntary choices we make, so different choices could be made that would be less destructive.  The importance of making those different choices is Milman's ultimate point, a message we should all take to heart.  (Note:  Milman is a British journalist who specializes in the environment.)

What did I gain from reading this book?  In reading this book, I increased my knowledge about the ongoing decline of insects, giving me a deeper commitment to supporting insects and other species in my home's landscape.

    The Silent Earth, by Dave Goulson, was also written about the precipitous decline of insects.  I read this excellent book in 2023 and will discuss it in a post about the books I read that year.


Wilding: Returning Nature to Our Farm, by Isabella Tree, New York Review Books, 2018.

    I've seen this book recommended for years, but it was about an estate in Britain, so I resisted reading it.  What insights could it have that would be of benefit to backyards in the States?  Well, it turns out that this book is chock full of new understandings of ecological processes!  It was amazing.  I'll never look at an ancient tree in the same way again, and I have a much deeper appreciation for the variety of roles that such beings play.  There was information I won't be able to personally use for rewilding (reintroducing large herbivores into the landscape comes to mind) but I found the necessity for their presence and how they impacted the ecosystem to be fascinating.  I highly recommend this book.  (Note:  Isabella Tree is a writer and conservationist who, along with her husband Charlie Burrell, manages the Knepp Estate/Knepp Wildland Project.)

What did I gain from reading this book?  This book probably gave me my single biggest leap forward in understanding ecological processes since Doug Tallamy's Bringing Nature Home.


The Weight of Nature:  How a Changing Climate Changes Our Brains, by Clayton Page Aldern, Dutton (PenguinRandomHouse), 2024.

    We like to think that climate change, a.k.a. global warming, is "out there" and that we can insulate ourselves from it if we're thoughtful and careful...or simply don't give it credence or attention.  Aldern tells us exactly how wrong we are.  He shows us how global warming is changing (all of) our brains, making it harder to think and remember accurately, affecting the decisions we make, making us more prone to violence, giving many of us PTSD, and increasing our exposures to vectors of brain disease.  Climate change is also changing human cultures and language.  (Note:  Aldern is a neuroscientist turned environmental journalist.)

What did I gain from reading this book?  Aldern helped me to understand how ALL of us are already being affected by global warming, mentally and physically.


The Light Eaters:  How the Unseen World of Plant Intelligence Offers a New Understanding of Life on Earth, by Zoe Schlanger, Harper (HarperCollins Publishers), 2024.

    As I mentioned above when talking about The Nation of Plants, botany has been making huge leaps forward in our understanding of plants.  Schlanger's book takes a deeper look at some of these new discoveries and understandings.  Plants can communicate with each other and with some animals - not in the same way we communicate, but in important ways nonetheless.  Plants can feel when things happen to their bodies.  Plants treat their relatives differently than they treat less closely related individuals.  Plants even have memories.  A lot of these discoveries have the potential to significantly change how we relate with plants, which is a sobering thought indeed.  (Note:  Zoe Schlanger is a staff writer at the Atlantic, where she covers climate change.)

What did I gain from reading this book?  From this book, I gained a clearer knowledge of the recent advances in botany that are changing our fundamental understanding of plants.


How to Love a Forest:  The Bittersweet Work of Tending a Changing World, by Ethan Tapper, Broadleaf Books, Minneapolis, 2024.

    Tapper, a forester, bought a "worn out" forest of 175 acres and is working to restore it to ecological health.  In this book, he discusses the sorts of decisions he has to make to help heal his land, some straightforward, but many nuanced and full of compromise.  Because of all the changes that have been made in our landscape over the last 400 years, restoring a forest is no longer as simple as just leaving it alone to restore itself.  Invasive species must be removed, deer populations managed through careful hunting, and other sometimes hard decisions have to be made.  Tapper talks of the necrosphere, the world of dead and dying organisms, and how vital it is to the health of the forest.  His writing is evocative and haunting.

What did I gain from reading this book?  With a wooded yard, I was excited to find this book and read Tapper's advice about forest management, but I came away with many insights into far more than just forestry.

 


What If We Get It Right?:  Visions of Climate Futures
, by Ayana Elizabeth Johnson, One World (Penguin Random House), 2024.

What would our lives - and our childrens' and our grandchildren's lives - be like in the future if we were able to stop, even repair, global warming?  These days we hear almost no visions of the future that aren't apocalyptic.  Most of these depressing visions are being encouraged by people who want all of us to give up and to accept the status quo so that they can continue to rake in profits.  What If We Get It Right? takes a brief, but thorough, look at where we are and at where we're headed if we make no meaningful change.   Then Johnson talks with 20 people fighting to guide us to a brighter future.  The book ends with a detailed look at a potential future where we're successfully fighting global warming as well as making other changes to provide a cleaner, healthier, more just future.

What did I gain from reading this book?  I gained hope from reading this book.  Hope, and knowledge of the work being done in many different fields to move us forward into a brighter, but not a warmer, future.


There are so many fascinating books being published.  These are the few that I read in 2024.  What books have you been reading, and what have you been learning from them?  I'd love to hear about them in your comments.


 

Sunday, January 05, 2025

The Restorative Magic of Rewilding

There's not a lot I can do to affect the outcome of global warming or to stop the biodiversity crisis.  That fact tends to keep me awake at night.  However, "not a lot I can do" is not the same as "nothing I can do".  I have found a way to make a difference in both crises, even if it is a small difference, and that way is right outside our home.  Even better, every day I can literally see the difference I'm making.

What's making the difference?  Rewilding.  My husband and I are doing our best to let the land we currently steward heal itself, restore itself.  Over the last 5 years, because of our restorative choices, we have gone from seeing no moths and few butterflies or native bees to seeing all of these and more regularly.

Tiny, but mighty. In this photo, the Thin-lined Calligrapher is feeding at Blue-eyed Grass (Sisyrinchium angustifolium).   The larvae of this species of syrphid fly are fierce predators of aphids, while the adults pollinate flowers as they feed.

 

What does rewilding our yard entail?  Here are the simple steps that we are taking...or not taking, as the case may be.


1.  Leave the leaves.  Our yard is part of the eastern deciduous forest and it has many large native trees that grew within a forest setting, so they are tall and straight with few low branches.  In the fall, these trees drop LOTS of leaves, which we simply...leave.  Blanketing the ground, the leaves protect the soil from erosion, hold in soil moisture, feed the trees and other plants as they decompose, and provide habitat for an amazing number of animals.  While doing all of that, they also store carbon - and help store more carbon in the soil as they decompose.


As a caterpillar, this beautiful little Red-banded Hairstreak lived in the leaf litter and fed on the fallen leaves of various trees, such as wax myrtle and sumac.  Here it is nectaring at Blue Mistflower (Conoclinium coelestinum), a native perennial.


2.  Minimize lawn.  In our case, there was no functional lawn in the yard when we moved in...so we didn't try to add one.  Ours is a shaded yard, which grass doesn't like, so we're choosing not to fight that battle.  If we had a lawn, we'd be managing it as a "freedom lawn", free from pesticides and fertilizers and welcoming low-growing native plants like violets and nimblewill.


3.  Let native vegetation grow naturally.  As new plants appear in the yard, I do my best to identify them.  If they are native, I generally let them grow with little further fuss..  Some of these plants have actually been growing here for years, suppressed and invisible because of decades of mowing.  Other native species have come up from the seedbank in the soil.  Many natives have come from seeds deposited by birds and other animals as they move through our landscape.  Plants like mayapple, frost aster, American pokeweed, rough-leaved goldenrod, nimblewill, and numerous tree and shrub seedlings have appeared "on their own" in one of these ways.


The Late Boneset (Eupatorium serotinum) in this photo is an example of a native that seeded itself into our yard.  I found I loved it almost as much as this Eastern Tiger Swallowtail does, so I transplanted a second one from our daughter's yard and bought 3 more to add to the area.


4.  Remove invasive plants.  Perhaps surprisingly, this is an extremely valuable step.  The importance of native plants is that they have co-evolved with and are eaten by native insects and other native animals, so they support animal life.  Invasive plants, which are aggressive non-natives, don't get eaten and therefore have no limits on their growth and reproduction.  Invasives can take over entire landscapes, smothering the native plants in the process.  Think kudzu, the vine that ate the South.  It's like having plastic plants as far as supporting birds and other wildlife are concerned.


The lush green grass that's carpeting this woodland floor is actually invasive Japanese Stilt Grass.  An annual that seeds heavily, stilt grass rapidly takes over and suppresses almost all other vegetation.  Nothing eats it, so the forest floor essentially becomes a green desert where it grows.  We had a fair amount of stilt grass, which I have worked hard to suppress by hand pulling.  There will always be some, but right now it's easy to keep under control as I work on other things around the yard.


5.  Avoid using pesticides (including insecticides and rodenticides), fungicides, herbicides, and artificial fertilizers.  ("-cide"means "to kill").  Your rewilding landscape will re-establish its own balances and counterbalances, remaining much healthier than it ever could be by using toxins and artificial chemicals within it.  The only exception to this rule is the judicious use of specific herbicides, if necessary, to help remove particularly problematic invasive plant species.


Doing its best to imitate a half-eaten stem, this inchworm is one of many caterpillars that now call our yard home...that is, they call it home until they get eaten or until they pupate and change into moths or butterflies.   Inchworms are the larvae of geometrid moths;  this one is feeding on Rough-leaved Goldenrod.  Dr. Doug Tallamy reports that 95% of all woodland birds raise their young on insects, especially caterpillars.  If you want birds, you have to have caterpillars.   If you want caterpillars, you can't use insecticides.



This is what happens when you "sit on your hands" and don't use insecticides.  See that little orange "bug"?  That's an oleander aphid on swamp milkweed...being eaten by the larva of a lacewing!  There was a pretty good crowd of oleander aphids for a little while, but the lacewings and syrphid flies moved in and feasted.  Within a couple days, the oleander aphids were gone.  If you want lacewings and syrphid flies to do your pest control, you can't use insecticides...or even squash or wash off the aphids.


6.  Plant native plants that fit our specific ecosystem community.  In our eastern deciduous woodland yard, for example, we have added blueberries, beauty berries, Christmas ferns, bloodroot, mayapple, and pawpaw, among others.

Here a Variegated Fritillary is laying an egg on a decrepit looking Common Violet (8/3/24).


7.  Observe what's going on!  It's so common for gardeners to be "all work & no play" in their gardens, but I consciously and regularly take time to walk around, just to look and learn - and to take photos.  This is how I find new species appearing and it's an important way I figure out how different plants and animals are interacting.

A case in point.....


There haven't been many, but each summer or fall I usually find a monarch caterpillar or two on the Swamp Milkweed (Asclepius tuberosa) that I have planted around the yard.  I found this one and a sibling in early September.  True to form, after a few days the caterpillars disappeared.  I always hope they've pupated and flown off successfully, but it's rare for me to know with any certainty.



In this case, I was luckier than usual.  At the end of October, I noticed this little bit of "debris" in amongst the seed heads of this Late Boneset (Eupatorium serotinum), located about 15' away from the swamp milkweed where I'd observed the monarch caterpillars 7 weeks earlier.  If you look closely, you'll see that this is an empty pupa, with the monarch having successfully hatched.   Presumably, by the time I found this bit of evidence, the monarch was well on its way to Mexico.


8.  Learn.  Then learn some more.  There are so many fantastic resources these days, from books to YouTube videos, from our local native plant societies to online seminars, from native plant nurseries to websites, from podcasts to Facebook groups.  Fellow wildlife gardeners and rewilders can be especially fun to learn with and from.


After years of seeing this book, I finally read it this summer - and it was amazing.  It's about an English estate whose owners were losing money in traditional agriculture, so they decided to "wild" it.  Even though the species discussed are British, the concepts are universal and I learned an incredible amount from reading it.  I'll never look at an ancient, half dead tree the same way again.


9.  Put up signage in your yard to showcase what you are working to accomplish.


We put up this "real estate" box near the road to share updates about why and how we are rewilding our yard.  I try to put out new updates several times a year.

10.  Share news of your discoveries and successes with others, through photos and Facebook posts and conversations.  Who knows?  You may even want to start your own blog!


August, 2023, was the first time we saw this beautiful species in our yard.  It's called a Common Buckeye and the caterpillars feed on Wild Petunia (Ruellia sp.) and Plantain (Plantago sp.), among a few other species, both of which we now have in our yard.   Here the adult is nectaring at Hairy Elephant's Foot (Elephantopus tomentosus).


Are my husband and I making a difference?  Yes, I know we are.  

From rarely seeing any insects when we first moved in (fall 2019), to documenting over 550 species of animals in the yard during the last 2 years, it's obvious that our yard is now supporting much more biodiversity.  The majority of those newly documented species are the all important insects.  Does that mean we are overrun with "bugs"?  Not at all!  I actually have to look hard to see many of the insects living here. A huge proportion of insects, it turns out, are predators on other insects, working to keep our little ecosystem balanced and functioning smoothly.

Not only are we making a visible difference through our choices, this is frankly fun.  We see small iridescent green bees and big yellow striped swallowtails, robber flies and lacewings, tree frogs and skinks.  A wide variety of birds hang out in our yard, providing a background chorus for much of the year.  Our grandsons are becoming excellent birders and sharp observers of the natural world.

We can't save the entire world by ourselves, but we can do our best to save our little corner of it.  The more of us working together on wildlife gardening, even rewilding, the larger our impact will be.

Sunday, August 04, 2024

An Eventful Week in the Abbott Annex of Homegrown National Park

 What a week it's been!


Last Wednesday, an immature Cooper's Hawk (Accipiter cooperii) caught, killed, and ate a Mourning Dove (Zenaida macroura) right outside my office window.  Yes, I felt bad for the dove...but the hawk has to eat, too.  It seemed really hungry and stayed in that same spot, eating nonstop, for over 90 minutes.

A new species of firefly has started flashing in the yard lately, during the time immediately after dark.  Unfortunately, I don't have any photos to share.  We noticed them Friday night, when our cable went out due to a storm.  With no internet to distract us, we sat on the front porch watching the storm - and serendipitously noticed the fireflies.  This species seems to flash in a fairly long, horizontal single flash - no "J dip".  I haven't been able to find an adult during the day yet; I'm hoping to so that I can try to identify which species this is.

This evening I thought I might re-enact my childhood and catch a couple in a jar, look at them up close, and then release them...but either fireflies have gotten a lot more elusive or I've gotten a lot worse at catching them.  It didn't help that it was lightly raining, thunder was grumbling, and there were occasional flashes of lightning in the sky.  My heart just wasn't in the project.  I kept seeing headlines that read, "68 Year Old Woman Struck By Lightning As She Tried To Catch Fireflies In A Jar".  I guess it would make a good family history story, though.

A new-to-the-yard firefly species would bring our yard total up to 4 different species of fireflies.



The eggs of the Eastern Bluebirds (Sialia sialis) have hatched.  Not only are Mom and Dad Bluebird busy getting food for the chicks, but there's a juvenile hanging around that I think may be from an earlier clutch.



Right outside the bluebird box, the berries on our large American Pokeweed (Phytolacca americana) have started to change color, and the birds are eating them as fast as they ripen.  Note the bright pink remnants of a berry cluster?  THAT bunch didn't last long!  

Cardinals (Cardinalis cardinalis) seem to be very common consumers, as do the Bluebirds themselves.  Blue Jays (Cyanocitta cristata) tried to come in to snack on the berries, too, but the Bluebirds were having none of that, thank you very kindly.  They were  extremely vigorous in driving the jays away.  The Bluebirds didn't seem to mind the Cardinals, though.  I saw one juvenile Eastern Towhee (Pipilo erythrophthalmus) hop into the bush, but a human visitor scared him away before I could see if he was just passing through or if he was actually there to eat.  And, if the latter, whether he would upset the Bluebirds.



Yesterday, I was lucky enough to see a Variegated Fritillary (Euptoieta claudia) bopping all around the back yard, laying eggs on a large number of Violets (Viola sororia).  I've understood for years that violets are the host plants for fritillaries, but I've never seen any sign of caterpillars on any violets that I've grown.  I'm looking forward to being a fritillary grandparent now!



The Variegated Fritillary took a few moments to relax from her labors and I was able to snap a photo - not a good one, but still enough to let you know what she looks like in general.  She was about the size of a Painted Lady or Red Admiral.

Note:  Apparently this species of fritillary differs from many of the other fritillary species in having additional host plants besides violets.  According to iNaturalist, in our yard the other host plants would be Plantain (Plantago sp.), Mayapple (Podophyllum peltatum), and possibly Yellow Passionvine (Passiflora lutea), since 3 other Passiflora species are listed as host plants.



Shortly after I lost sight of the Variegated Fritillary, a Spicebush Swallowtail (Papilio troilus) zipped in and seemed to lay eggs on the Spicebush (Lindera benzoin) by the back shed.  I was able to capture a photo of the butterfly, but I didn't catch her "in the act".  Now I know, though, that I'm likely to see the folded leaves that signal Spicebush Swallowtail caterpillars in the near future.  

As I meander in the yard this summer, I feel like I'm seeing an exciting increase in insect species, especially in butterflies and moths.  So far this year I've seen Spicebush Swallowtails (Papilio troilus), a Pipeline Swallowtail (Battus philenor), Tulip-tree Beauties (Epimecis hortaria), 2 species of Underwing Moths, Baltimore Snouts (Hypena baltimoralis), and over 15 other moth species that are "new to the yard".  Those are just the ones I've been able to take photos of that were clear enough to identify.  There have been many, many more moths and butterflies than fluttered away without posing for me.  And I'm only seeing the adults, the ones that weren't turned into baby birds or other animals when they were caterpillars!

I recently finished reading Oliver Milman's The Insect Crisis: The Fall of the Tiny Empires That Run the World, published in 2022.  It was a sobering read and reinforced my passion for rewilding our little space, working to create a bit of habitat where native plants and insects have a chance to live and flourish.

We started caring for this yard in the fall of 2019.  Over the course of that first year, I saw just a couple butterfly and skipper species - and no moths, despite being outside pulling Japanese Stiltgrass for what felt like days on end.  

The difference between then and now is so incredibly heartening.  It gives me hope.  We've removed invasive species, left the leaves, left native seedlings that were "planted" by birds, and we've also planted more native plants.  We haven't sprayed insecticides or herbicides.  That's it.  Nothing fancy or complicated.  That's been our management plan as we try to give nature some breathing space to recover.  And our yard has responded: it is infinitely more full of life now than it was 4 years ago.  We CAN have a positive impact.


Sunday, July 28, 2024

Hairy Elephant's Foot, A Surprising Pollinator Magnet

At least until you get to know them well, there are some plants that are hard to get excited about.  Often that's because they don't have fascinating foliage or stunning flowers.  Just because a plant isn't classically beautiful, though, that doesn't mean it isn't greatly loved by pollinators and other insects.


Frankly, Hairy Elephant's Foot (Elephantopus tomentosus) is just such a plant.  It is a hard plant to photograph well.  For the first few months of spring and summer, it consists of a few large, hairy leaves lying flat on the ground, all coming from a central point.  Not glamorous, but definitely easy to photograph.

It's in July that the trouble begins.  The plants start to put up their flowering stalks, which rise for 12-15" above the basal leaves.  There is hardly any foliage on these stems at all.  At the top of each stalk, sudden branches stick out awkwardly, each crowned with a trio of small, bright green, hairy, pointy "leaves".  Nestled within those bracts, the small, lavender flowers open, dainty and subtle.  They open in the morning and close in mid afternoon.


These delicate little blooms wash out readily in a photo, especially in any bright light.   Their dainty airiness just looks sparse on "film", even though it looks charming en masse in real life.

A great plant for shade, Hairy Elephant's Foot grows well there, although it tends to be rather widely scattered.  Unexpectedly last year, I had an experiment in our yard when a neighbor cut down several large trees right near our joint property line and turned what had been almost complete shade into full sun, for 5-6 hours each day.

I expected the shade-loving understory plants that grew in that area to frazzle and die, which many of them did.  The Hairy Elephant's Foot, however, had a banner year, blooming prolifically and attracting an amazing number of pollinators and other insects - 21 different species that I was able to photograph!

So how do I best share the amazing number and diversity of insects that I observed?  A simple list, even illustrated with photos and spiced with bits of (hopefully) interesting information, seems overwhelming and ultimately boring.  So I thought I would talk about a few of the "categories" of insects that I observed:  1) Butterflies and Skippers, 2) Pest Control Squad - Solitary Wasps and Syrphid Flies, 3) A Predator and Prey Duo, 4) Native Bees - Pollinators Extraordinaire, 5) Flies, and 6) Passersby.

Two of the species I photographed using Hairy Elephant's Foot last summer are considered somewhat rare or threatened:  the American Bumble Bee and the Yellow-thighed Thick-leg Fly, a form of syrphid fly.  Both are shown below in their appropriate categories.


BUTTERFLIES AND SKIPPERS:

It's always fun to start with "the pretties" - and I've come to think of butterflies and skippers as "flying flowers", the prettiest group of insects overall.

Butterflies and skippers (and moths) are more than just pretty, though.  Their caterpillars are, according to Dr. Doug Tallamy, one of the primary ways that energy, captured by plants from the sun, moves up the food chain.  EVERYTHING seems to eat caterpillars.  For those of us who are birders, that's especially true of most of the songbirds, 95% of whom raise their young on insects, especially caterpillars.  

So in feeding adult butterflies and skippers, Hairy Elephant's Foot is also helping to keep those adults in our yard, thus supporting the production of caterpillars to feed the upcoming generation of birds and other animals here.



Eastern Tiger Swallowtail (Papilio glaucus), 8/19/23.   With a variety of host plants in the Magnolia and the Rose families, Eastern Tiger Swallowtails are fairly common across a wide range in North America.  In our yard, I'm guessing that they usually spend their larval time on Tulip Poplars, since we have several extremely large specimens of that majestic tree.  It's often easy to overlook the fact that trees can serve as important host and pollinator plants.



Zebra Swallowtail (Eurytides marcellus), 8/19/23).  If you don't have pawpaws, you won't have Zebra Swallowtails.  Our neighborhood has a plethora of pawpaws, in great part because deer don't like it and so it spreads with little competition in our deer-challenged yards.  Consequently, we have a plethora of zebra swallowtails.  Most of the time, these ethereal beauties are just floating through, but Hairy Elephant's Foot got them to stick around for a bit.



Common Buckeye (Junonia coenia), 8/20/23.  This was the first time I had seen a Common Buckeye in our yard.  I've started planting Carolina Petunias (Ruellia caroliniensis) as a "matrix plant" and it turns out that they, along with plantains, are host plants for Common Buckeye caterpillars, along with several other species.  So, was it a coincidence to see this one last summer, a year or two after I started adding Carolina Petunias to the yard?  Or the result of adding yet another native plant species to the local plantscape?


Silver-spotted Skipper (Epargyreus clarus), 8/23/23.  If you look very closely, you can also see a little crab spider under the flowers to the right of the skipper.  The caterpillars of Silver-spotted Skippers feed on many plants in the pea family, from Wisteria to Tick-trefoils, where they build a shelter with silk.  According to iNaturalist, it's unusual to see this species visiting yellow flowers;  they prefer blue, pink, red, purple and even white blooms.


Wavy-lined Emerald Moth caterpillar (Synchlora aerata), 8/23/23.  This is the only species of butterfly or skipper (or moth) that I have seen using Hairy Elephant's Foot as a host plant.  These little guys camouflage themselves by sticking pieces of the flower they are eating to their bodies, so this one has purple bits pasted to it, but the same species will have bright yellow bits on one of the Rudbeckias, white bits on Mountain Mint, etc.  Many times, it's hard to see the caterpillar body at all!  The adult moth is a very pretty light emerald green with wavy lines, as suggested by its name.

Other butterflies that I've observed nectarting on Hairy Elephant's Foot include the Sleepy Orange (Abaeis nicippe) and the Cabbage White (Pieris rapae).  Other skippers that I've observed include Horace's Duskywing (Erynnis horatius), Common Checkered Skipper (Burnsius communis), and Zabulon Skipper (Lon zabulon).


PEST CONTROL SQUAD - SOLITARY WASPS:

Wasps seem scary to many of us, but it's literally a few "bad apples" that have spoiled the barrel of public opinion.  Social wasps (paper wasps and yellowjackets) live in colonies, which they defend vigorously.  Solitary wasps, on the other hand, build nests by themselves and are not at all aggressive.  They will only sting if you attempt to catch them in your bare hands.  I have not observed any social wasps using Hairy Elephant's Foot, but I've observed several solitary wasp species doing so.

All wasps raise their larvae (their "babies") on meat, usually on paralyzed insects, sometimes on paralyzed spiders, and (for social wasps) on chewed up insects.  Because they raise their young on other insects and on spiders, wasps are important predators in our yards and gardens, helping to keep the populations of other species in balance and under control.

Solitary wasps paralyze various species of insect or spider and then lay an egg on the paralyzed prey.   Each different species of wasp preys on a different species of insect or spider.  After being paralyzed, the prey animal lives and provides fresh food for the larva when the wasp egg hatches.  Gruesome, to my mind, but very effective.


Double-banded Scoliid Wasp (Scolia bicincta), 8/20/23.  Scoliid wasps are scarab beetle predators, digging for beetle larvae (a.k.a. grubs) in the soil, paralyzing them, and laying an egg on each.  When the egg hatches, the wasp larva eats the beetle larva, then pupates in the host body.   These wasps are excellent grub control!  About 10 years ago, when we lived in south-central Kansas, I did an entire blog post on this species:  http://gaiagarden.blogspot.com/2014/08/double-banded-scoliid-wasp.html



Blue-winged Scoliid Wasp (Scolia dubia), 8/20/23.  Isn't this a cool looking wasp?!  I had never seen this interesting looking species before last summer.  As a scoliid wasp, it is another species that preys on scarab beetle larvae (white grubs), like the Double-banded Scoliid Wasp above.  It is thought that these species may also parasitize Japanese beetle larvae!  


Gold-marked Thread-waisted Wasp (Eremnophila aureonotata), 8/21-3/23.  I've always wondered how anything - food, blood, etc. - gets through that narrow waist!  Anyway, this interesting looking solitary wasp preys on larger moth larvae, like those of the sphinx moths and owlet & cutworm moths, for food for its larvae.


Fraternal Potter Wasp (Eumenes fraternus), 8/20/23.  There's a reason this little wasp is called a "potter wasp" - the female builds a gorgeous little mud pot in which she stashes the caterpillars that she paralyzes for her young to eat.  She then lays an egg and closes the pot, also with mud, making a perfect little nursery.



Weevil Wasp (Cerceris halone), 8/23/23.  Another solitary wasp, this wasp provisions the cells in her nursery burrows with paralyzed weevils from the genus Curculio.


A PREDATOR AND PREY DUO:

There are bees known as "cuckoo bees" that parasitize the nests of other bees.  Often this happens by the cuckoo bee following the female of its host species back to her nest.  When the host female departs for another load of pollen and nectar to provision her latest brood cell, the female cuckoo bee quickly ducks in and lays an egg.  Generally, when the egg of the cuckoo bee hatches, it either attacks and kills the larva of the host bee, or it hatches first and eats the egg of the host bee before it hatches.  Either way, the cuckoo bee larva then eats the provisions that the mother host bee stored for her own offspring, pupates, and emerges the following year in place of the young of the host bee.

The relationship between the host bee and the cuckoo bee is often very specific, with each cuckoo bee parasitizing only a single species.

How does the cuckoo bee find the host bee?  Well, she hangs out at the same "bar", so to speak.  The life cycles of the host bee and the cuckoo bee are perfectly timed to overlap, and both will be found nectaring at the same flowers.  I found such a pair using the blooms of Hairy Elephant's Foot in our yard:  the Two-spotted Longhorn Bee (host) and the Lunate Longhorn-cuckoo Bee (parasite).



Two-spotted Longhorn Bee (Melissodes bimaculatus), 8/20/23 - host bee.  This almost pure black bee gets its name from the two squarish white spots on either side of its abdomen.  Unfortunately, you can't see those field marks in this photo.



Lunate Longhorn-cuckoo Bee (Triepeolus lunatus), 8/20/23 - cuckoo bee (parasite).


NATIVE BEES - POLLINATORS EXTRAORDINAIRE:

More people are understanding the importance of our native bees for pollination.  The beloved Honey Bee is actually a European import, brought here by colonists who unsurprisingly wanted the honey it produced, as well as its pollination services.  But, for all we hear about honey bees pollinating plants, they are not as efficient at the job as many of our native bees are.

Before the European colonists arrived, there was no problem with pollination in North America.  This continent has almost 4000 species of native bees, often with life cycles exquisitely timed to coincide with those of the plant they evolved to partner with.  Some of these native bees are generalist pollinators, others are specialists who only pollinate one single species, still others pollinate the flowers of just a few plants.

I have not seen honey bees use Hairy Elephant's Foot, although that certainly doesn't mean they don't.  The bees I've seen pollinating this plant all fall under the heading of generalist native bees.  I'll start with two different bumble bee species.....



American Bumble Bee (Bombus pensylvanicus), 8/23/23.  According to iNaturalist, this species used to be one of the most common types of bumble bee, especially in the south, but 90% of its population has been lost in the last 20 years.  It is now considered threatened throughout much of its range.



Common Eastern Bumble Bee (Bombus impatiens), 8/20/23.  As its name implies, this is the bumble bee that I see most commonly in our yard.



Eastern Carpenter Bee (Xylocopa virginica), 8/20/23.  What looks like a bumble bee but has a smooth abdomen?  A carpenter bee.  Great pollinators, they do NOT eat wood...although they do tunnel into it to make their solitary nests.  The females will reuse existing nest tunnels, only taking the time and energy to excavate new tunnels when absolutely necessary.



Pure Green Sweat Bee (Augochlora pura), 8/20/23.  This beautiful little bee nests in rotting logs, a habitat that we have been restoring on our property.  The fertilized females also overwinter underneath rotting logs, waiting until it's time for them to emerge in the spring.


FLIES:

Many flies act as pollinators, although they are not as well known in that role as bees are.  The first species I share here is one of the relatively rare species I've seen on Hairy Elephant's Foot.



Yellow-thighed Thick-leg Fly (Tropidia albistylum), 8/23/23.  This is a relatively rare species of syrphid fly with a very unattractive common name.  As of this writing, there are only 212 observations of this species in iNaturalist, as opposed to 25,000-50,000 observations of two more common syrphid fly species that I've seen in our yard.



Greenbottle Fly (Lucilia sp.), 8/20/23.  This genus of flies (I can't identify this photo below that level) are scavengers, generally speaking.

There were at least 2 other species of flies that I photographed on Hairy Elephant's Foot, but I was unable to identify either of them further.


PASSERSBY:

Of course, in watching any plant or area, there will be some insects that just happen to perch for a while.  Rounding out this line-up of Hairy Elephant's Foot insect fans are a couple of those more incidental visitors....



Blue Dasher (Pachydiplax longipennis), 8/22/23.  This is a dimorphic species, meaning that the male and female look dissimilar.  This individual is a female;  it is the male that has the blue coloration for which the species is named.  Dragonflies are fierce predators of smaller insects.  I'm always hoping the ones I see are living up to their colloquial name of "mosquito hawks".



Eastern Tailed Blue butterflies (Cupido comyntas)  - and a Midge (7/30/23).   Hairy Elephant's Foot can even be used for a bit of canoodling, with or without a voyeuristic midge looking on.

In conclusion, Hairy Elephant's Foot is not a classically "beautiful" plant, but it sure packs a powerful punch for wildlife.  Including insects I've seen but not photographed, I've noticed over 30 different species using this plant - and the deer don't bother it at all.  If you can find a corner somewhere, I highly recommend it.  I've never seen Hairy Elephant's Foot "in the trade", but personal experience tells me that it transplants well.  Mine just showed up on their own.  Keep your eyes peeled or ask if anyone you know has some they'd be willing to share.  You'll be glad you did.  

Wednesday, June 19, 2024

Tiny, But Mighty, Pollinators

It's Pollinator Week, so it seems like a perfect time to write about pollinators.  Little pollinators, to be more specific.

The first spring after we moved into The Land of the Giant Trees, small white flowers with yellow centers appeared in relative abundance around the yard.  Although I was pretty sure these were some sort of fleabane (Erigeron sp.), I wasn't sure which one.


"Are they useful for pollinators?" Prairie Boy kept asking, "Because they look rather weedy."  The question amused and irritated me.  We have all been brainwashed to think that almost any plant that grows without being purchased from somewhere is a "weed".  I'm trying hard to uproot this attitude from my own psyche, but it's well established and deeply rooted, even for me.  

Despite my amusement about Prairie Boy's question, I had trouble answering it.  My instinct was to say yes, the fleabane was useful for pollinators since these plants were native, but I honestly wasn't seeing much action on the flowers.  No honey bees.  No bumble bees.  No butterflies.  (Although that last observation wasn't really fair, since we weren't seeing any butterflies anywhere.)

Surely SOMETHING was using the fleabane!

It seemed like a good idea to identify which fleabane we had.  It turned out to be Philadelphia Fleabane (Erigeron philadelphicus), a biennual. Now I could learn more about the plant and know what to expect from it in future years.

I started watching the blooms more closely...and I started noticing quite a bit of activity on the them.  However, almost all the visitors were tiny little insects that I literally couldn't see from very far away.  No wonder it didn't look like there was much activity on the fleabane until I started looking closely!  

The aster-like flowers of Philadelphia Fleabane are relatively small, about 3/4-1" in diameter, and most of the insects were MUCH smaller than the flowers.  In fact, many were so small that I had trouble identifying them much beyond "flying insect" with just my eyes.  As the days and weeks went by, though, it was obvious these tiny animals were, in fact, pollinators - and they were excellent pollinators at that.  The flowers developed into healthy seed heads in short order.

Eventually I started using my camera to focus on the tiny pollinators of Philadelphia Fleabane and other small flowers, trying to learn the identify of these minuscule creatures.  It's an amazing world that exists literally right alongside us - and yet most of us are completely unaware of these important little creatures who live inches from us.


As I explored this minute world further, I found a varied cast of characters.  Not only were there pollinators, but there were predators and parasitoids and even passers-by, who just seemed to be stopping in the neighborhood for a rest and a quiet "think".

For example, in the photo above, there is a Georgia Mason Bee (Osmia georgica) in the middle of the photo.  There is also a Club-horned Wasp (Sapyga centrata) in the upper left, a Harvestman (a.k.a. Daddy Longlegs) below that, a Crab Spider on the bloom just below and to the right of the mason bee, a tiny wasp about to land on that same bloom, and some other insect hiding on the other side of that blossom that I can't quite make out.  Any of these insects can be acting as pollinators as they move across the flowers, although the mason bee and the wasp are the ones we would traditionally categorize that way.  

Blue-eyed Grass (Sisyrinchium angustifolium) is another native plant that I didn't see pollinators using until I started looking more closely - and with a camera.  This member of the iris family has beautiful blue, but tiny, flowers.  They average about 1/2" in diameter.


In the photo above, a small Blue-eyed Grass flower is being pollinated by a tiny sweat bee (Lasioglossum sp.).....


and, in this second photo, another small Blue-eyed Grass flower is being pollinated by a tiny Thin-lined Calligrapher (Toxomerus boscii), a syrphid fly which is not only a pollinator as an adult, but a fierce aphid predator in its larval stage.

One of our native spireas, Meadowsweet (Spiraea alba), is another plant whose small flowers often attract small pollinators to them.  Each individual Meadowsweet flower is less than 1/4" across, although these small flowers are clustered in much larger, showy panicles.


It's easy for us to see the Emerald Flower Scarab (Trichiotinus lunulatus) pollinating the Meadowsweet flowers above, but the tiny, black Tumbling Flower Beetle (Mordella sp.) just beside it is also a potent pollinator, despite the fact that this little creature measures only about 1/4", just like each individual Meadowsweet flower it visits.

Goldenrods are yet another example of plants with showy, gorgeous blooms...that actually consist of tiny individual flowers.  They often attract tiny pollinators, too.


Here is a cloud of tiny sweat bees (Lasioglossum sp.) pollinating the flowers on Wreath Goldenrod (Solidago caesia) last October. Lasioglossum bees are fairly common tiny, but mighty, pollinators.

I was taught about the role of insects in pollination by learning about the Western Honey Bee, (Apis mellifera) which is actually a fairly large bee.  I'm not a gambler, but I'd be willing to place a good-sized bet that you learned about pollination as a function of the European honey bee, too.  Did you realize that honey bees are not native in North America, and that many folks consider them an invasive species?!  

So how did the plants on this continent get pollinated before Europeans brought honey bees over with them?  Our native pollinators, that's how, and many of these native pollinators are TINY.  Our native pollinators evolved with our native plants to do the job that needed to be done, and they are exceptionally good at doing their job. 

Check your flowers this summer.  Look past the "giant" bumble bees and the "large" honey bees for the smaller pollinators.   Then take a moment to let yourself get lost in wonder at the Lilliputian worlds all around us. It's pretty close to magic for me.