TL;DR: Baby dragonflies (called larvae or nymphs) live underwater in the Fox-Wolf Watershed. They have an incredible snap-out jaw for catching food and can jet forward by pushing water out of their butt! They love to eat mosquito larvae (thank you very much), tadpoles, and even tiny fish. Finding lots of them usually means the water is clean and healthy.
Meet the baby dragonfly
A nymph is a baby dragonfly. It hatches from an egg in the water and lives there for months or even years. It looks a bit like a little brown tank: six legs, big eyes, short wing pads, and colors that help it blend in so it can eat and not get eaten.
Built to hunt
Dragonfly nymphs are ambush hunters. Their lower jaw, called a labium, shoots out like a tiny arm to grab prey. They eat mosquito larvae, other small insects (even other dragonfly nymphs!), tadpoles, and small fish. Lots of animals eat them, too: bigger fish, frogs, and birds. That’s why nymphs are usually drab and hard to spot.
Jet power (how they move and breathe)
Nymphs breathe with internal gills inside their body near the tail end. They pull water in and push it out to zoom forward. It’s a quick escape move and helps with surprise attacks. That same water pressure helps power their fast jaw snap.
From mud to wings
As they grow, nymphs molt or shed their outer skin. When they’re ready to be adults, they climb a reed or rock and slip out of their old skin. The dry, empty shell is called an exuvia. Look for these “little statues” on plants along the water’s edge. How many can you find?
What nymphs tell us about our water in the Fox-Wolf Watershed
Dragonfly nymphs are a sign of clean, healthy water. When we find lots of them and of different kinds in our streams, wetlands, and lakes, it usually means the water and habitat are in good shape. Fewer nymphs can be an indicator or even a warning sign that we need to give a place more care.
Where to look (and how to be kind)
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Check weedy shorelines, quiet coves, and slow parts of streams.
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Search gently with a small net or scoop. Use a clear tray or jar to look, then it’s important to put them back where you found them.
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Spot an exuvia? It’s safe to pick for a closer look.
How you can help (easy wins)
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Plant native plants along the shore. They keep soil in place and give nymphs places to hide.
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Use less lawn fertilizer and bug spray. Rain can wash it into the water.
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Pick up pet waste and keep leaves and grass clippings out of storm drains.
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Join the Fox-Wolf Watershed Cleanup or volunteer as a water quality monitor or support healthy waters with a small gift.
Key facts
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Names: Dragonfly larvae, Dragonfly nymphs
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Size: About ¼–2½ inches long
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Look: Stocky body, big eyes, short wing pads, no feathery tail gills (those belong to damselflies)
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Diet: Mosquito larvae, other insects (even other nymphs), tadpoles, small fish
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Movement: Jets forward by pushing water out; jaw snaps out to grab food
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Time underwater: Months to a few years
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Why they matter: A sign of clean water in places like the Fox-Wolf basin
Dragonfly larvae quick answers (FAQ)
How long do they live underwater?
From a few months to several years, depending on the species and water temperature.
What do they eat?
Mosquito larvae, other small water bugs, tadpoles, and tiny fish.
Are they dangerous?
No. They might pinch small prey, but they don’t hurt people or pets.
Why should I care?
Because nymphs help control mosquitoes, and their numbers tell us if our lakes and rivers are doing well.
Dragonfly or damselfly nymph, how can I tell?
Dragonfly nymphs are chunkier and have no feathery tail gills. Damselfly nymphs are slimmer with three tail gills.
