Great Cormorant

The great cormorant is a large water bird whose weight is reported to vary widely, from 1.5kg to 5.3kg. The lightest averages cited are from Germany, where 36 males averaged 2.28kg and 17 females 1.94kg, and the heaviest are from Prince Edward Island in Canada, where males averaged 3.68kg and females 2.94kg (Wikipedia, general species account).

The only source read for the Bhutan guide gives these weights. No plumage, range, habitat, diet or breeding information was found, so none is stated, and the entry is kept short. Its occurrence in Bhutan is flagged for checking.