the common hawk-cuckoo, hierococcyx varius, popularly known as the brainfever bird

animal asia avian background beak beautiful bill bird birdwatching brainfever branch bright cacomantis canorus chick close color colorful common cuckoo cuculidae cuculus emerald female field green grey hawk hierococcyx image isolated merulinus nature nest nestling outdoor parasite perching plaintive resting robin sitting thailand varius watch white wild wildlife