Description
Adult males are iridescent black on their head, back, sides and tail. They have a white stripe behind the eye and a lower white stripe across each side of the head, a red chin and a bright yellow belly. They have black wings with large white patches. The female is completely different in appearance: mainly black, with a pale yellow breast, a brownish head with black streaking and fine barring on the back, breast and sides. Originally, the female was considered to be a different species and named the Black-breasted Woodpecker by Cassin.
They excavate a new nesting cavity each year, sometimes reusing the same tree.
These birds feed on sap, mainly from conifers, but insects are their main food source during the nesting season and they also eat berries outside of the breeding period.
These birds drum to establish territories.
This species may be declining in some parts of its range due to habitat loss.
The species took its common name from Lieutenant Robert Stockton Williamson, who was the leader of a surveying expedition which collected the first male. They were trying to identify the best route west for a railway to the Pacific Ocean.
Read more about this topic: Williamson's Sapsucker
Famous quotes containing the word description:
“Everything to which we concede existence is a posit from the standpoint of a description of the theory-building process, and simultaneously real from the standpoint of the theory that is being built. Nor let us look down on the standpoint of the theory as make-believe; for we can never do better than occupy the standpoint of some theory or other, the best we can muster at the time.”
—Willard Van Orman Quine (b. 1908)
“A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else.”
—John Locke (1632–1704)
“It is possible—indeed possible even according to the old conception of logic—to give in advance a description of all ‘true’ logical propositions. Hence there can never be surprises in logic.”
—Ludwig Wittgenstein (1889–1951)