Birdwatching close up shot of a pink-backed pelican, pelecanus rufescens with greyish plumage, busy preening and cleaning feathers with its bill by the swamp at bird sanctuary wildlife park

pelecanus pelican preen waterbird beak bird plumage wildlife rufescens zoo ornithology grey animal fauna conservation birdwatching freshwater species langkawi wing large singapore pouch habitat reserve mangrove environment swamp nature madagascar malaysia feather pale natural groom backed bill lake water wild arabia park africa shore clean pink sanctuary foliage tree