Female--Length, about 24 inches; wing, about 17; tail, 9-1/4. Male--Length, about 21 inches; wing, 15; tail, 8-1/4. In young birds the upper parts are dark greyish brown or brownish grey, each feather barred and tipped with a much lighter grey. The under plumage is dusky white, splashed more or less profusely, especially on the breast and flanks, with streaky spots and splashes of greyish brown. At the first moult the brown tinge begins to disappear, and the spots on the breast and flanks become more heart-shaped than longitudinal, and less profuse. In subsequent moults the spots become smaller and smaller, and the whole plumage fades to a lighter grey, the bars on the upper plumage often softening gradually to a greyish white. The sides of the head and lower nape are white, with brownish lead-coloured shaft marks in the immature plumage, fading and diminishing as the hawk moults. The moustachial streak is wanting in this variety. This species of ger was very highly esteemed in antiquity; and individual falcons were occasionally presented by the kings of Denmark to foreign potentates as a high compliment. In modern times it has been found delicate, and difficult to keep in health. Mr. Newcome had some which flew well at herons, but did not find them so generally effective as peregrines. The late Maharajah Dhuleep Singh flew them with success at hares. Lord Lilford, however, was unable to get them to fly rabbits or hares, and found them liable to a troublesome affection of the feet. Norway Falcon (_Falco gyrfalco_) Female--Length, about 22 inches; wing, 16; tail, 9. Male--Length, 19-1/2 inches; wing, 14; tail, 8-1/4. In the young the general colour of the upper plumage is a lead-coloured brown, each feather tipped and margined with a somewhat lighter brown or buff. The flight feathers are also similarly margined. The lower back is sometimes tinged with grey. The tail is tipped with white, and barred rather closely with a speckly buff. The breast is profusely streaked with longitudinal blotches on a white ground, as in the peregrine; but these markings are of a rather duller brown. At the moult the markings on the under plumage diminish greatly in size and number, especially on and near the chin, and become more or less tear-shaped--this tendency to decrease continuing in subsequent moults. In the upper plumage the brown is replaced by slatey grey, barred with a lighter blue-grey, which in patches, especially upon parts of the feathers which are habitually hidden, are nearly white. The tail becomes slatey brown, with narrow bars of brownish grey. This species has a broad well-marked moustachial streak, which is dark brown in the immature and dark grey in the adult. The cere and eyelids are blue-grey, and the legs and feet bluish lead colour; but all become yellow in the adult.