The HOOPOES (_Upupa_) may be regarded as the most aberrant of the Tenuirostral group. They are moderately large, and slenderly formed; their beak is long, slender, higher than it is broad, and in some species much curved; the small, oval, and open nostrils are situated immediately beneath the feathers that cover the brow; the strength of the foot varies considerably; the wings (in which the fourth and fifth quills are the longest) are much rounded; the tail, formed of ten feathers, is either short and straight at its extremity or long and graduated. The compact and variegated plumage differs considerably as to its coloration, and but little variety is observable between the two sexes. THE HOOPOE. The COMMON HOOPOE (_Upupa epops_) is recognisable by its elongate body; long, slender, slightly curved, and pointed beak (which is much compressed at its sides); and short powerful foot armed with blunt claws. The wing is decidedly rounded; the tail of moderate size, composed of broad feathers, and straight at its extremity. The soft, lax plumage, which is prolonged into a crest on the top of the head, is much variegated, and almost alike in the various species with which we are acquainted. Reddish brown of a more or less lively hue usually predominates in its coloration, while the wings and tail are striped with white. In the Common Hoopoe the upper portion of the body is of reddish brown, variegated with black and yellowish white on the middle of the back, and on the shoulder and wings. The crest is of a deep reddish yellow, tipped with black; the under side is bright reddish yellow, spotted with black on the sides of the belly; the black tail is striped with white about its centre. All the colours in the plumage of the female are duller than in that of her mate. The young are recognisable by the comparative smallness of their crest. The eye is deep brown, the beak greyish black, and the foot lead-grey. The length of this species is about ten and its breadth eighteen inches. The wing measures five, and the tail four inches. The greater portion of Europe, Northern Africa, and Central Asia are inhabited by these birds, which are specially numerous in the more southern portions of those regions, and instances are recorded of stragglers having been seen as far north as the Loffoden Isles. In some of the central provinces of Europe they appear about the end of March, and leave again in pairs, or small parties, at the commencement of autumn. Such as inhabit North-eastern Africa do not migrate, but merely wander at certain seasons over the surface of the country. In Southern Europe these birds frequent the vineyards, but in North-eastern Africa they prefer the immediate vicinity of towns and villages, and render great benefits to the inhabitants by assisting the Vultures, whose proceedings we have already described, in their revolting but most valuable labours.