What are 20 species that live in a pa pond

Sturdeons, Paddlefishes, Gars, Bowfines, Mooneye, Freshwater Eels, Herrings, Carps and Minnows, North American Catfishes, Smelts, Trouts and Salmons, Cods, Topminnows, Sticklebacks, Sculpins, Temperate Basses, Pikes and Mudminnows, Sunfishes, Perches and Darters, Drums and Croakers.

EXAMPLES Dunkleosteus, Sea Lamprey, Ohio Lamprey, Northern Lamprey, Shortnose Sturgeon, Atlantic Sturgeon, PaddleFish, American Book Lamprey, Mountain Brook Lamprey, Lake Sturgeon, Spotted Gar, Longnose Gar, Bowfin, Mooneye, American Eel, Blueback Herring, Alewife, Gizzard Shad, Hickory Shad, American Shed, Bluntnose Minnow, Central Stoneroller, Cutlips Minnow, Emerald Shiner, Rainbow Smelt, Pink Salmon, Stonecat, 

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.