a yellow-vented bulbul bird perched on top of a tree branch

animal animals avian aviary bird birds blend branch branches bulbul bulbulbs bush bushes cackle cackling call calling camouflage camouflaged canopy crown cull culling dawn dusk environment evening feather feathers flu fly flying foliage forager foragers forest garden h1n1 h5n1 high influenza jet jungle leaf leaves little loud mammal mammals morning nature one park perch perched predator predators rise rising sars scavenger scavengers single small solitary sun sunrise tiny top tree trees twig twigs vented yellow