Common Buzzard

The common buzzard measures 40 to 58cm in length with a wingspan of 109 to 140cm. In Great Britain males alone range from 427 to 1,183g, and females from 486 to 1,370g (Wikipedia, general species account).

The only source read for the Bhutan guide gives these measurements. No plumage, range, habitat or diet information was found, so none is stated. The Himalayan buzzard, formerly treated as a form of this species, has its own entry.