Amphibians:
* Frogs and toads: They eat a variety of insects, worms, and even small fish, making them omnivores.
* Salamanders: Some species of salamanders are omnivores, eating insects, worms, and small aquatic plants.
Reptiles:
* Turtles: Many turtle species are omnivorous, feeding on plants, insects, and even small fish.
* Snakes: Some snake species that live in ponds are omnivorous, like the garter snake, which eats insects, small amphibians, and occasionally plants.
Fish:
* Carp: These fish will eat a variety of food, including algae, insects, and small crustaceans.
* Catfish: While some catfish are primarily scavengers, others will also consume plants and insects.
* Tilapia: This popular fish can be omnivorous, eating algae, plants, and insects.
Insects:
* Dragonflies and Damselflies: Their larvae (nymphs) are predatory, but the adult stage eats insects, pollen, and nectar.
* Water Striders: These insects are carnivorous but will occasionally consume decaying plant matter.
Other:
* Crayfish: Crayfish are opportunistic feeders and will eat a variety of food, including decaying matter, algae, insects, and small fish.
* Muskrats: These rodents can be found in and around ponds. They primarily eat plants, but they will also eat insects, frogs, and small fish.
Important Note: The specific species of omnivores found in a pond will depend on the location and the specific conditions of the pond.