Hainan partridge  (Arborophila ardens)

This typical, grey-brown partridge can be recognised by the boldly contrasting colour of its bright orange neck. This vivid colour separates the grey breast from the black head, which bears a distinctive and conspicuous white ear spot (2) (3). The female is similar to the male but paler below (2). Pairs give far-carrying territorial duets comprising of two-note (falling then rising) whistles, often repeated (3).