chestnut-collared longspur calcarius ornatus singing on the grasslands of colorado

animal aves avian background behavior bird birding birdwatching calcarius chestnut close closeup collared color colorado conservation detail environment fauna feather fence field grassland grasslands life living longspur natural nature organism ornatus ornithology outdoor outdoors outside passeriformes passerine pawnee perched perching plains rural singing small summer vertebrate wild wildlife wing wire