Black-naped Woodpecker

The black-naped woodpecker is a south-eastern form that some authorities treat as a separate species from the grey-headed woodpecker, which the source describes. The grey-headed woodpecker is about 25 to 26cm long and 125g, with green upperparts, a grey head and breast and a black moustache stripe; males have a red forecrown (Wikipedia, general species account).

The grey-headed woodpecker complex ranges from Europe across Asia to the Pacific and south to the Himalaya, Nepal and the Malay Peninsula. It prefers deciduous forest with many dead trees, feeds mostly on ants and their young, with fruit and berries in autumn, and drums on resonant surfaces including metal roofs. It breeds in May with five to ten eggs and both parents raise the young. The source gives no details specific to the black-naped form (Wikipedia, general species account).