Ключевые слова: adult, animal, avian, bird, birdwatching, black, blue, brown, ccfpd, cook county, cook county forest preserve, diver, duck, eared grebe, fauna, float, fowl, glide, grebe, horned grebe, illinois, iridescent, lake, lakeside, male, maple lake, mature, metallic, midwest, migrate, migration, migratory, ornithology, paddle, podiceps auritus, pond, sheen, slavonian grebe, songbird, spring, swim, swimming, united states, wade, water, waterbird, waterfowl, wildlife, yellow,