Close up shot of a tired common ostrich, struthio camelus, head feathers with thin layer of down, sleeping with eyes fully closed at bird sanctuary wildlife park

flightless beak close up head ostrich camelus zoology zoo bird fauna animal wildlife eye ornithology species portrait struthio birdwatching southeast asia malaysia savannah langkawi captivate close feather detail enclosed national fatigue sleep south large singapore wild natural common african farm nature africa rest travel park geographic safari environment nap sanctuary habitat