Sooty-headed Bulbul in the hills of Hong Kong

AJP took this photograph of a Sooty-headed Bulbul (Pycnonotus aurigaster) in Hong Kong a couple of weeks ago. This is  the third most common bulbul in Hong Kong and noticeably much less common than when we lived there in the 1960s. I think the clue is in its habitat: ‘scrubland and thinly wooded hillsides’. The hills certainly fitted that description in the 1960s following the gathering of anything for firewood during the Japanese occupation but since then the trees have grown considerably, thus reducing the suitability of the hillsides for this species—and also cutting off former familiar views for walkers on Hong Kong island, for example. The common name that used to be used in Hong Kong was Red-vented Bulbul, a name that also applies to another species, P. cafer, largely confined to the Indian subcontinent.