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Woodpeckers of many species drill holes into the sides of houses and, in some cases, cause considerable damage. The current belief is that the birds mistake some household appliance — an electric clock, for instance — as an insect and go after it for food.
Woodpeckers do not have elaborate songs such as that of a Cardinal or Song Sparrow. Most vocalizations are sharp, quick and distinct such as the sharp keer of a Flicker or the dry rattle of a Downy Woodpecker. Rhythmic tapping or drumming is used as a form of communication in courtship and to proclaim territorial rights.
On occasion, reports surface of a woodpecker that has discovered that drumming on metal — a gutter or drain pipe — makes a splendid sound and carries great distances. Female woodpeckers perceive this with pleasure, but residents of the house on which the metal is attached are often jolted awake in the early morning by the sound of a woodpecker drilling on a gutter.
Drilling for food is not the only kind of work performed by woodpeckers. Deep nesting cavities — narrow at the top, broad and bowl-shaped at the bottom — are excavated for not only a place to deposit a clutch of pure white eggs but for snug sleeping chambers.
Speckled, thus camouflaged, eggs offer a degree of protection from detection by predators of birds building open, cup-shaped nests in
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