critically endangered straw-headed bulbul

wwdsymposium jimmytst shb strawheadedbulbul critically endangered straw-headed bulbul bukit batok east nature park garden secondary rainforest forest dependent bird songbird wildlife landscape tropical jungle asia wild branch rare species conservation status brown orange singapore black stripes streaks plumage feathers avian countryside rural fringe periphery outskirts city natural vegetation native indigenous uncommon resident breeder animal seed disperser tree plant perched melody sound voice singing melodious streaky twigs