Lesser scaup by similar-looking "Aythya" hybrids. Except for hybrids between the two scaup species, the most reliable mark is the black bill-tip of hybrids, whereas in the scaups only the very point ("nail") of the bill is black. This is even recognizable at considerable range, as the scaups' bills appear uniformly grey from a distance, whereas those of hybrids look two-colored. European hybrids typically involve the tufted duck ("A. fuligula"), yielding offspring that have a small nape crest unlike any European "Aythya" species. Female and immature hybrids typically lack the white bill base, except in those between lesser scaup and ring-necked duck,
A Bird came down the Walk other evil forces.Then the narrator offers the bird a piece of crumb,but the bird neglects it and then it flies away. Helen Vendler regards the poem as a "bizarre little narrative" but one that typifies many of Dickinson's best qualities. She likens the poet to a reporter observing a murderer in the act, and later, pretending fear that the murderer may be dangerous to herself and must be mollified by a "crumb". The bird takes flight and Vendler regards what follows - the description of the bird in flight - as "the astonishing part of the poem". Vendler notes that