Paradoxornis heudei

The reed parrotbill (Paradoxornis heudei) is found in Manchuria, eastern China and the Russian Far East and is threatened by habitat loss. The northern subspecies polivanovi is sometimes regarded as a separate species, the northern parrotbill. It has a significantly short, wide and deep bill, and is the only parrotbill that changes its appearance between the breeding and non-breeding seasons: in winter it has a pinkish-cream and ash-grey forehead and neck. (Wikipedia, general species account)