Damselflies eat other flying insects, particularly midges and mosquitoes.Source: http://dragonflies-and-damselflies.blogspot.com/2009/06/what-do-dragonflies-and-damselflies-eat.html
Frogs!
They eat grass and plants. Most nymphs feed upon minnows and tadpoles.
Hey all Damselfly larvae eats worms and small Gambuzia (small Fish) CYA Sarah!!!
Many types of birds and fish, especialy trout.