SUB-FAMILY STERCORARIINÆ
Bill with a cere; claws large, strong, hooked.
132. Stercorarius (Skua). Bill moderate, strong, rounded above, compressed towards the tip, which is decurved; nostrils far forward, diagonal, pervious; hind toe very small, scarcely elevated; the middle tail-feathers more or less elongated.
ORDER PYGOPODES
Wings short
FAMILY ALCIDÆ
(Auks)
Bill much flattened vertically (compressed); wings short; legs placed at the extremity of the body; feet three-toed, palmated; tail short. Food, mostly fish, and captured by diving.
133. Alca (Razor-bill). Bill large, sharp-edged, the basal half feathered, the terminal part grooved laterally; upper mandible much curved towards the point; nostrils nearly concealed by a feathered membrane; tail pointed.