accounts have appeared in the works of naturalists on the subject of the plumage of the male and female Eider (Somateria m. mollissima) and the age at which the sexes arrive at maturity. In nearly all of these there is much guesswork owing to the small series of specimens examined, although in several of the accounts it is stated correctly that the male bird becomes adult in its third year. So lon...

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now