swiftlets bird on the dried tree branches in hala-bala wildlife sanctuary.

aerodramus animal asia bala bang bird birds birdwatching blue branch branches color comata dried fly flying forest fresh glossy green hala halabala hemiprocne illustration isolated jungle landscape lang mountain natural nature needletail nest park peninsular rainforest reservoir sanctuary scenery south summer swift swiftlet swiftlets thailand throated tree treeswift tropical water whiskered white wild wildlife yala