
Photo: Christoph Moning · CC BY 4.0 (May be cropped or resized)
Mareca penelope
Size
42–52cm
Wingspan
71–80cm
Weight
500–1,073g
The Eurasian wigeon is a dabbling duck 42 to 52cm long with a wingspan of 71 to 80cm and a weight of 500 to 1,073g (Wikipedia, general species account).
The only source opened for the Bhutan guide gives these measurements and nothing else, with no plumage, range, diet or breeding detail, so none is stated. The entry is kept short on purpose rather than padded.