Lake Animals and Birds Question :)?

Birds & snakes feed on bigger animals of a lake.Freshwater shrimp feeds on detritus & small epifauna. Mosquito fish feeds on larvae of insects.Turtles on macrophytes & chlorophyceae.Eels are carnivores & feeds on small fishes & small shrimps.Blood worms feeds on benthic mud which contains decaying organic matter.Can't say much of birds.They usually feeds on fishes except ducks..