The fish population draws birds to the waters of Holman Lake. Bald eagles and osprey do not nest at Little Buffalo State Park, but they do fish the waters. Great blue heron and green heron wade in the shallows of the lake in search of fish, frogs and crayfish. Wood ducks make their home at the lake along with mallards and Canada geese. The woods and field surrounding the lake are the home of the once rare bluebird. These birds became endangered due to the loss habitat. They nested only in tree cavities. People have helped the bluebird by constructing birdhouses that mimic the woodpecker holes that bluebirds would naturally use to build their nests. Turkeys and ruffed grouse live in and thrive in the forests of Little Buffalo State Park.