Backswimmers are often important to trout, especially in ponds. They're one of the insects which usually doesn't factor into a fly angler's decisions at all, but it pays to be aware of them because in just-so situations the trout eat nothing else.
» Family Notonectidae (Backswimmers)
3 genera aren't included.
Be careful handling them--they have a painful bite.Egg-Laying BehaviorThe adults breathe air. Normally they rest upside down at the water's surface with part of their abdomen sticking up just out of the water to breathe, but they can dive for extended periods carrying an air bubble with them. They are able to leave the water and fly around.Nymph Biology
Diet: Other insects, including other backswimmersBackswimmer nymphs are fierce predators upon other aquatic insects.
Pictures of 2 Backswimmer Specimens:
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