Ключевые слова: animal, avian, beak, bill, bird, birdsong, birdwatching, black, blue, branch, brown, call, chirp, dickcissel, fauna, field, grass, grassland, grasslands, green, illinois, isolated, kankakee sands preserve, meadow, no people, one, ornithology, passerine, perch, perched, plains, prairie, profile, sing, singing, single, sit, solitary, song, songbird, sparrow, spiza americana, stick, tallgrass, the nature conservancy, trill, twig, united states, warbler, will county, yellow,