Tag Archives: nymph

Waiting for Prairie Dragonflies

“Wild beauty sustains us…it makes each of us an heir to wonder.” — Terry Tempest Williams

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Crocus bloom in my backyard, bright spots in the brittle little bluestem and prairie dropseed.

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When I see these flower faces turned toward the sun, I know it won’t be long until the dragonflies arrive on the prairie. I check Willoway Brook. Then, the local ponds. A prairie stream.

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Under the water’s surface, the dragonfly and damselfly nymphs are waiting.

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Soon, they’ll emerge…

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…then transform from creatures of the water to their teneral stage. Weak, colorless, they are at the mercy of birds, frogs, and predators with an urge for a “dragonfly crunch” lunch.

TeneralAmericanRubyspotSPMAWilloway6718WM.jpg They slowly transform……

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…to aerial experts with brilliant coloration.

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Those eyes!

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The diversity of Odonates never ceases to startle…

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…delight…

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…and amaze.

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The spreadwing damselflies like this one below (so difficult to ID)….

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…remind us there is mystery in the midst of knowledge. Not everything can be known at a glance. Then, later, the white-faced meadowhawk dragonflies show up, their pearl faces lending confidence to their name and ID.

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Some early emergents seem to scoff at April snows and colder weather. We may even see green darners working the ponds for early insects by the end of March. Weather permitting. Down south, the migratory dragonflies will begin making their way to the Midwest. They’ll arrive soon—at the end of the month or early in April—the green darners, the wandering gliders, the black saddlebags…

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…ready to find a mate.

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Together…

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…they give us hope for a healthy and prolific Odonate future.

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Soon, the prairie will come alive with the whiz and zip of dragonflies and damselflies. Meanwhile, we watch. Anticipating.

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Will you be there to see them return and emerge? Walk the prairie paths. Be alert.

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Eyes to the skies.

I can’t wait.

******

Terry Tempest Williams (1955-) is writer-in-residence at Harvard Divinity School. Her latest book Erosion: Essays of Undoing explores her work as a writer, activist, and educator.

All photos copyright Cindy Crosby and taken in previous dragonfly seasons (Top to Bottom): crocus (Crocus sativus), author’s backyard prairie plantings, Glen Ellyn, IL; stream through Springbrook Prairie, Forest Preserve of DuPage County, Naperville, IL;  Hine’s emerald dragonfly nymph (Somatochlora hineana), Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve of DuPage County, Warrenville, IL; Willoway Brook, Schulenberg Prairie, The Morton Arboretum, Lisle, IL; teneral American Rubyspot damselfly (Hetaerina americana), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; American Rubyspot damselfly (Hetaerina americana), Nachusa Grasslands, Nature Conservancy of Illinois, Franklin Grove, IL; American Rubyspot damselfly (Hetaerina americana), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; Carolina saddlebags (Tramea carolina), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; familiar bluet damselfly (Enallagma civile), Nachusa Grasslands, The Nature Conservancy Illinois, Franklin Grove, IL; eastern amberwing dragonfly (Perithemis tenera), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; blue dasher dragonfly (Pachydiplax longipennis), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; unknown spreadwing (Lestes spp.), Ware Field prairie planting, The Morton Arboretum, Lisle, IL;  white-faced meadowhawk (Sympetrum obtrusum), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; black saddlebags dragonfly (Tramea lacerata), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; Carolina saddlebags dragonflies (Tramea carolina); Ware Field prairie planting, the Morton Arboretum, Lisle, IL; ebony jewelwing damselflies  (Calopteryx maculata), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; Halloween pennant dragonfly (Celithemis eponina); Schulenberg Prairie, The Morton Arboretum, Lisle, IL; exploring the Schulenberg Prairie, The Morton Arboretum, Lisle, IL; exploring the Schulenberg Prairie, The Morton Arboretum, Lisle, IL.

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Cindy’s new book, Chasing Dragonflies: A Natural, Cultural, and Personal History is available for preorder now from your favorite indie bookstore, The Morton Arboretum Store, or online  (with original art from Peggy Macnamara, Field Museum artist in residence).  Publication is June 2020 from Northwestern University Press.

Join Cindy for a Class or Talk in March

The Tallgrass Prairie: A ConversationMarch 12  Thursday, 10am-12noon, Leafing Through the Pages Book Club, The Morton Arboretum, Lisle, IL. Open to the public; however, all regular Arboretum admission fees apply.  Books available at The Arboretum Store.

Dragonfly Workshop, March 14  Saturday, 9-11:30 a.m.  Nachusa Grasslands, Franklin Grove, IL. Free and open to new and experienced dragonfly monitors, prairie stewards, and the public, but you must register as space is limited. Contact phrelanzer@gmail.com for more information.  Details will be sent with registration. UPDATE: THIS WORKSHOP IS POSTPONED. Watch for new date soon!

Tallgrass Prairie Ecology Online begins March 26 through the Morton Arboretum.  Details and registration here.

See more at http://www.cindycrosby.com 

Under the Prairie Ice

“To keep every cog and wheel is the first precaution of intelligent tinkering.”–Aldo Leopold

*****

Polar Vortex! In the Illinois prairie region, all the chatter is about the week’s forecast: wind chill temperatures of 50-plus degrees below zero. Brrr! It’s a good time to dream a little bit about the summer to come.

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One of my favorite tasks as a prairie steward is monitoring dragonflies.  People often ask me in the winter, Where are the dragonflies now? How do they survive the brutal cold? 

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Some, I tell them, like the green darners and black saddlebags, have migrated south to reproduce. Later generations journey back north again, much like the well-publicized monarch butterfly. But most of our dragonflies are still here—in the nymph stage—under the surfaces of streams, ponds, and pools of prairie wetlands, waiting for spring and warmer temperatures. Under the prairie ice.

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Dragonflies and their population changes tell us a lot about our water quality. Dragonfly responses to climate also help us understand what we see happening in the see-sawing temperatures and weather changes in the world around us. Good reasons to care! With this in mind, citizen scientists monitor dragonflies of all species, tracking their numbers each year.

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We need our dragonflies. I’ve spent a lot of time kayaking and looking for dragonflies and damselflies on Silver Lake at Blackwell Forest Preserve in Warrenville, Illinois, just for fun.  But now, in this January cold, the lake is full of ice fisherman.

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Just across the preserve, not far from the ice fishing houses, is my destination—the Urban Stream Research Center. Here, one of our most vulnerable insect species, the Hine’s emerald dragonfly, is being reared.

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Some people dream of meeting sports heroes. Others, their favorite rock star. Me, I dream of seeing the Hine’s emerald dragonfly (Somatochlora hineana) winging its way through a prairie preserve. It’s our only federally-endangered dragonfly. Finicky? Yes! It has a lot of special requirements, including shallow flowing water and time spent in burrows made by the devil crayfish. 

During the winter months, I pore over my favorite dragonfly field guide by Kurt Mead part of the North Woods Naturalist Series

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… and open it to the Hine’s emerald dragonfly spread. Then, I think what it would be like to see the real thing.

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Today, I’ll get part of my wish.

Heading up the project in its third year in the Chicago Region is DuPage County Forest Ecologist Andrés Ortega. His enthusiasm for dragonflies and passion for the project are evident from the first moment of my arrival at the center.

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Andrés reaches into a refrigerator, and pulls out a dozen vials of tiny Hine’s emerald dragonfly nymphs.

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The dragonfly nymphs are in “diapause,” just as nymphs are outdoors. These nymphs enjoy cool refrigerator temps of about 40 degrees Fahrenheit;  their normal overwintering temperature, Ortega tells me.

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The eggs were gathered from gravid female dragonflies at known breeding sites in DuPage and Cook Counties, Andrés tells me.  Once netted, the tip of the female dragonfly’s abdomen is dipped into water—a process that simulates ovipositing—causing her to release her eggs. After the eggs are harvested, they are taken to a research laboratory in South Dakota. Here, they hatch and are cared for through their first months or even years of nymph life.

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Then, they are driven to Illinois and hand-delivered to Ortega at the Urban Stream Research Center.

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These are ferocious little critters. Andrés tells me they keep similar-sized nymphs with other similar-sized nymphs, as larger ones will enjoy the smaller ones for dinner if thrown together. Cannibalism! It’s a bug-eat-bug world out there. Staff carefully control the water quality (which should not be too clean) and water temperature.

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In the spring, the nymphs will be released into the research center’s indoor raceways. These are long pools that mimic stream-like conditions. The temperature of the water in the raceways is carefully calibrated to reflect the rising temperatures outdoors.

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Raceways are custom made by employees expressly for the dragonfly rearing. Sand, rocks, frayed rope pieces, and plastic aquarium plants offer hiding places for the nymphs. In about mid-May, the nymphs will begin feeding from a menu that includes small crustaceans and midge larvae. The screens and netting will keep midges from escaping and interfering with other research work at the center, such as mussel propagation.

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It will take the dragonfly nymphs about four to five years to reach maturity, from the egg stage to the beautiful creatures of the air I see in my field guide. When ready to emerge, they will be released into suitable nature preserves in the state.

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Ortega tells me that less than one percent of the Hine’s emerald dragonfly nymphs survive in the wild. Pretty slim odds, aren’t they?  I’m grateful to people like Andrés Ortega. He is one of our unsung heroes, doing the hard work of keeping part of the natural world from vanishing forever.

The next time you see a frozen prairie stream or pond this winter, think of the many different species of dragonflies waiting to emerge, just underneath the surface. Who knows? This might be the year we see more of the Hine’s emerald dragonflies, cruising through prairie wetlands. I’m planning to show up and look.

How about you?

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The Aldo Leopold quote that opens this essay is from Round River. Leopold is often referred to as the father of wildlife ecology and the United States’ wilderness system. Please visit The Aldo Leopold Foundation’s website to learn more about Leopold and his work, which is carried on today.

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Grateful thanks to Andrés Ortega for his tour of the Urban Stream Research Center; his patient answers to all my questions;  his reading and suggested edits for this blogpost (all remaining errors are my own); and his terrific work with dragonflies. Contact him at aortega@dupageforest.org.

Many thanks to super nice guy Kurt Mead, author of Dragonflies of the North Woods, Third Edition (2017), and Sparky Stensaas, co-owner of Kollath+Stensaas Publishing, who approved using the cover and pages with the Hine’s emerald dragonfly for this post (and also thanks to photographer Troy Hibbitts whose Hine’s emerald images (thehibbets.net) appear on those pages. If you are interested in dragonflies, you should own this beautiful guide–it is indispensable for Midwestern dragonfly chasers, even if you live a little further south of the North Woods (I live in Illinois).  Order from your favorite local bookseller, or online here.

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All photos copyright Cindy Crosby (top to bottom): Mt. Hoy, Blackwell Forest Preserve, Forest Preserve of DuPage County, Warrenville, IL; cold day at Springbrook Prairie, Naperville, IL; hundreds of Canada geese (Branta canadensis) on open water of Springbrook Creek at Blackwell Forest Preserve, Forest Preserve of DuPage County, Warrenville, IL;  male calico pennant (Celithemis elisa), Schulenberg Prairie, The Morton Arboretum, Lisle, IL:  ice fishing shacks on Silver Lake, Blackwell Forest Preserve, Forest Preserve of DuPage County, Warrenville, IL; Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve of DuPage County, Warrenville, IL; Cover of Dragonflies of the North Woods, Third Edition, by Kurt Mead (2017), courtesy Kollath+Stensaas Publishing and Kurt Mead; interior spread, Dragonflies of the North Woods, Third Edition, by Kurt Mead (2017), courtesy Kollath+Stensaas Publishing and Kurt Mead. Andrés Ortega (Homo sapiens), ecologist, Forest Preserve District of DuPage County, Warrenville, IL; vials of Hine’s emerald dragonfly (Somatochlora hineana) nymphs, Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve District of DuPage County, Warrenville, IL; Hine’s emerald dragonfly (Somatochlora hineana) nymph, Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve District of DuPage County, Warrenville, IL; Hine’s emerald dragonfly (Somatochlora hineana) nymph,Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve District of DuPage County, Warrenville, IL; Hine’s emerald dragonfly (Somatochlora hineana) nymph, Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve District of DuPage County, Warrenville, IL; water system, Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve District of DuPage County, Warrenville, IL; raceway system, Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve District of DuPage County, Warrenville, IL; life support system, Urban Stream Research Center, Blackwell Forest Preserve, Forest Preserve District of DuPage County, Warrenville, IL; Fox River, Geneva, IL.

The Dragonfly Chasers

If you are old and you wish to be young again, if only for a moment, try and identify a dragonfly. — Simon Barnes

***

In the prairie ponds, streams, and wetlands, they wait. Dragonfly nymphs are about to emerge.

Last summer, I watched the scene below from my kayak. Female dragonflies lay eggs in water or vegetation. The male pondhawk dragonfly (powdery blue) “hover guards” the female (green) so no other males disturb her. Tapping her abdomen into the water, the female ensures another generation of dragonflies, as the male protects her from above. It all happens fast. So fast.

The eggs may hatch in a matter of weeks. In their nymph or larval stage, dragonflies (looking like ferocious beetles) cruise the water, sometimes for years. Then, one morning, these denizens of the deep scramble up a blade of grass and commence the difficult work of change. “Teneral” is the scientific term for the transformation stage. Each dragonfly nymph sheds its ugly husk, and exchanges it for a beautiful winged body.

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No longer a water-breather. The dragonfly is now a creature of the air. She takes flight.

Dragonflies dazzle us with their agile antics as they fly; stun us into silent admiration as they bask in sunlight.

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This April, I’ll join citizen scientists at Nachusa Grasslands and other prairies in hiking the tallgrass, looking for dragonflies and their close kin, damselflies.

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A “citizen scientist” is an amateur who contributes information to a scientific body of knowledge. My academic background is in art, journalism, and natural resource interpretation. I have no background in the hard sciences, or specifically, entomology (the study of insects). Yet, the fieldwork I and others do helps build our collective scientific knowledge of  the dragonfly world.

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Dragonfly monitors hike routes through the prairie and pencil hash marks on species lists, ticking off each dragonfly we discover. Green darner? Check. Halloween pennant? Check. Oohhhh… Jade clubtail! Check.

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As I monitor dragonflies,  I pay attention to anything that lifts off from the tallgrass at my approach. Is it a dragonfly? I watch closely.

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Yes! I log it on my list. Bonus: I observe other critters–such as bees and butterflies– as I walk. I note their presence in my journal, and alert site managers if I see something unusual.

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How does observing dragonflies and damselflies benefit us? The violet skimmer damselfly (below) and other species are complex and colorful. But besides the aesthetics, why should we care?

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Here’s why. Because dragonflies spend the biggest part of their lives in the water, the changes in health and populations of dragonflies and damselflies tell us a lot about how the quality of water changes over time. Clean water is essential to life and our well-being. Clean water is also a non-negotiable resource for future generations.

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And so, this summer, you’ll find me in the tallgrass, wandering along shorelines, or deep in a prairie stream, chasing dragonflies. Netting some for a closer look; photographing others. Carefully checking for identifying field marks.

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Sure, it’s citizen science. But it’s art as well. Those colors! Those wing patterns! Their names are poetry. Ebony jewelwing.

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Calico pennant.

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Springwater dancer.

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Their names help form the vocabulary of the prairie community.

If you love the natural world as I do, dragonfly monitoring is one enjoyable and simple way to make a small contribution to keeping it in good shape. Wherever you live, the dragonflies are waiting for you to notice them. Learn a few of their names. Make time to sit and watch them.

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It will be time well spent.

***

Simon Barnes (1951-), whose quote opens this blogpost, is a British sportswriter and wildlife columnist. Once employed by the London Times, he was fired from the newspaper after more than 30 years, supposedly for angering hunters with his remarks in an opinion column about saving an endangered bird. His 16 books include Birdwatching with Your Eyes Closed and How to Be a Bad Birdwatcher.

All photos copyright Cindy Crosby (top to bottom): video of eastern pondhawk dragonflies (Erythemis simplicicollis) at Busse Woods, Forest Preserve District of Cook County, Schaumburg, IL; female eastern amberwing dragonfly (Perithemis tenera), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; wandering glider (Pantala flavescens), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; Halloween pennant (Celithemis eponina), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; jade clubtail (Arigomphus submedianus), Warrenville Grove, Forest Preserve District of DuPage County, Warrenville, IL; close up Carolina saddlebags (Tramea carolina), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; monarch butterfly (Danaus plexippus) on new England aster (Symphyotrichum novae-angliae), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; violet dancer (Argia fumipennis violacea), Nachusa Grasslands, The Nature Conservancy, Franklin Grove, IL; little dragonfly chaser, Schulenberg Prairie, The Morton Arboretum, Lisle, IL; blue dasher dragonfly (Pachydiplax longipennis) on ashy sunflower (Helianthus mollis), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; male calico pennant (Celithemis elisa), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; ebony jewelwing (Calopteryx maculata), Schulenberg Prairie, The Morton Arboretum, Lisle, IL; springwater dancer (Argia plana), Nachusa Grasslands, The Nature Conservancy, Franklin Grove, IL; Prairie Walk Pond and Dragonfly Landing sculpture (Sculopterayx metallicaea), Lisle Park District, Lisle, IL.