Black-winged myna, acridotheres melanopterus perched on tree branch, squatting down and excreting droppings, close up shot of an endangered bird species in wildlife enclosure

black winged myna bird blackwinged wing species animal perch stand branch tree birdwatching nature natural habitat wildlife endangered conservation reserve starling breasted white tropical forest acridotheres melanopterus mask singapore zoo park mandai feather plumage java island bali rare protected extinction threaten indonesian indonesia defecate drop excrete squat guano poop