closeup portrait of black-crested yellow bulbul

animal asia asian avian background bill bird black blackcrested blurry bulbul closeup colorful conservation ecology environment environmental fauna feather flaviventris fly forest green jungle little living nature organism ornithology outdoor outdoors outside park parulidae passeriformes passerine perching petechia portrait posing pycnonotus setophaga small song spring sweet thai tree tropical warbler wild wildlife wing wings yellow