cassin`s sparrow peucaea cassinii on the pawnee national grass

animal aves avian background barbed behavior bird birding birdwatching cassinii cassins close closeup color colorado conservation detail environment fauna feather fence field grass grassland grasslands life living national natural nature organism ornithology outdoor outdoors outside passeriformes passerine pawnee perched perching peucaea plains rural small sparrow summer vertebrate wild wildlife wing wire