The WOODPECKERS (Picida), the last group of the tree-climbing races, possess a slender body and powerful peak, which is usually straight, conical, and furnished with a sharp ridge at its culmen. The short, strong feet turn inwards; the toes are long, and placed in pairs, the exterior pair being connected as far as the first joint; the hinder toe, which is the smallest of all, is so situated as to pair with the innermost and longest toe; in some instances this short fourth toe is but slightly developed, or entirely wanting; the claws are long, strong, very sharp, and much hooked. The wings are rounded, and of medium size; their ten primaries are narrow and pointed, whilst the secondaries (from nine to ten in number) are broader, but not much shorter, than the primary quills. Of these latter, the first is very small, those next in order graduated to the third or fourth, which is the longest. The very remarkable tail is formed of ten large and two small feathers. These latter are placed above instead of under the rest; the centre tail-feathers are the largest, and very stiff. The strangely constructed tongue, by the aid of which the Woodpeckers are enabled to capture the small insects upon which they in a great measure subsist, is sharp, barbed, pointed, and endued with a glutinous secretion, derived from glands situated in the throat, and communicating with the mouth by two long ducts, the glutinous coating being thus renewed every time the tongue is drawn within the bill. The plumage of these birds is thick; the feathers on the head (which in some species form a crest) are small and slender, whilst those on the hinder parts of the body are short and broad. The Woodpeckers inhabit the woods and forests of both hemispheres, and are especially numerous in warm latitudes. Fruits, seeds, and insects constitute their food, and in pursuit of the latter they exhibit wonderful dexterity—climbing with astonishing activity upon the trunks and branches of trees; and when, by tapping with their bills, a rotten place has been discovered, they dig at once vigorously in search of the grub or larvæ snugly embedded beneath the bark—thus rendering inestimable service to man, by destroying hosts of insects.
The Woodpeckers both roost and breed in hollow trunks, or holes in trees, enlarged to the requisite size by the aid of their strong, sharp mandibles. The eggs, which are smooth, glossy, and white, vary considerably in number; they are deposited upon a bed of chips, or débris, placed at the bottom of the hole selected for their reception.
The BLACK WOODPECKERS (Dryocopus) comprise the largest and most powerful of the race, and are at once recognisable by the crest that adorns their head, and the prevalence of black in the coloration of their plumage. America must be regarded as the central home of these birds, as there several kinds inhabit every latitude; whilst, in the Eastern Hemisphere, but one species is met with in Europe, and few are found even in India.
THE EUROPEAN BLACK WOODPECKER.
The EUROPEAN BLACK WOODPECKER (Dryocopus martius) has the plumage of a uniform black, with the exception of the top of the head, which is of a bright crimson; in the female the bright feathers are limited to a small patch at the back of the head. The eye of both sexes is pale yellow, the beak pearl-grey, tipped with blueish grey, and the foot lead-colour. The young closely resemble the adult birds. This species is from seventeen to eighteen inches long, and twenty-eight to twenty-nine broad. The wing, in which the fifth quill is the longest, covers two-thirds of the tail, which measures from six inches to six inches and a half; the tarsus is almost entirely covered with feathers, and exceeds the centre toe and claw in length. The strong beak is broader than it is high, and straight at its culmen.
Although all the wooded tracts of Europe, from sixty-eight degrees north latitude as far as Greece and Spain, are inhabited by the Black Woodpecker, it is seldom met with in England, and is but rarely seen in Holland. It also frequents Asia, as far as the northern side of the Himalayas. Everywhere fir and pine forests are its favourite resorts, even when these extend over mountain ranges; indeed, it rarely visits tracts covered with any other description of trees, except during its wanderings from one place to another. Like all other European Woodpeckers, this species does not migrate, and but rarely travels to any great distance from its native haunts.
THE WOODPECKER TREE-CHOPPER (Dendroplex picus).