Close up shot of a male Santa Cruz Ground-Dove, pampusana sanctaecrucis with puff up feathers spotted, twitching its eyes during sleep to remain alert to potential threats while resting

santa cruz ground dove perch rest tree branch plumage feather gallicolumba pampusana sanctaecrucis solomon island bird endangered species birdwatching singapore rescue wildlife reserve conservation zoo park mandai threatened vulnerable habitat extinction rare tinakula care male puff forest roost animal pigeon fluff twitch eye sleep nap doze off asleep sit alert environment