Description
Adults are mainly black on the upper parts and wings, with a white or pale back and white spotting on the wings; the throat and belly vary from white to sooty brown, depending on subspecies. There is a white bar above and one below the eye. They have a black tail with white outer feathers. Adult males have a red patch or two side-by-side patches on the back of the head; juvenile males have red or rarely orange-red on the crown.
The Hairy Woodpecker measures from 18–26 cm (7.1–10 in) in length, 33–43 cm (13–17 in) in wingspan and 40–95 g (1.4–3.4 oz) in weight. It is virtually identical in plumage to the much smaller Downy Woodpecker. The Downy has a shorter bill relative to the size of its head which is, other than size and voice, the best way to distinguish them in the field. These two species are not closely related, however, and are likely to be separated in different genera. The best way to tell the two species apart other than the size is the lack of spots on its white tail feathers (which the Downy has). Their outward similarity is a spectacular example of convergent evolution. As to why this convergence has evolved, only tentative hypotheses have been advanced; in any case due to the considerable size difference, ecological competition between the two species is rather slight.
These birds are mostly permanent residents. Birds in the extreme north may migrate further south; birds in mountainous areas may move to lower elevations.
These birds forage on trees, often turning over bark or excavating to uncover insects. They mainly eat insects, also fruits, berries and nuts, sometimes tree sap. They are also known to peck at wooden window frames and wood sided homes that may house bugs.
Read more about this topic: Hairy Woodpecker
Famous quotes containing the word description:
“The Sage of Toronto ... spent several decades marveling at the numerous freedoms created by a “global village” instantly and effortlessly accessible to all. Villages, unlike towns, have always been ruled by conformism, isolation, petty surveillance, boredom and repetitive malicious gossip about the same families. Which is a precise enough description of the global spectacle’s present vulgarity.”
—Guy Debord (b. 1931)
“God damnit, why must all those journalists be such sticklers for detail? Why, they’d hold you to an accurate description of the first time you ever made love, expecting you to remember the color of the room and the shape of the windows.”
—Lyndon Baines Johnson (1908–1973)
“Why does philosophy use concepts and why does faith use symbols if both try to express the same ultimate? The answer, of course, is that the relation to the ultimate is not the same in each case. The philosophical relation is in principle a detached description of the basic structure in which the ultimate manifests itself. The relation of faith is in principle an involved expression of concern about the meaning of the ultimate for the faithful.”
—Paul Tillich (1886–1965)