Light-vented Bulbul (Pycnonotus sinensis, 白頭鵯).
One of the most common birds in Changsha, and urban southern China in general, on account of its adaptability from forest to park. It is also one the noisiest resident birds, its sometimes ka-ko-wee, wee-wee-ker-wee, or other variations of three or four notes. Sometimes groups of light-vented bulbuls sing together, sending their bubbly cacophony through the woods or over the water.