Red-legged Kittiwake

The red-legged kittiwake is a very localised subarctic Pacific species. Apart from the distinguishing feature implicit in its name, it is very similar to its better-known relative, the black-legged kittiwake; other differences include the shorter bill, larger eyes, a larger, rounder head, and darker gray wings, and in the juveniles, which barely differ from the adults, lacking the black tail band and "W" across the wings of juvenile black-legged kittiwakes. Juveniles take three years to reach maturity. Adults are 35–39 cm (14–15 in) long, with an 84–92 cm (33–36 in) wingspan and a weight of 325–510 g (11.5–18.0 oz). Like the Pacific race of black-legged kittiwakes, the red-legged kittiwake has a well-developed hind toe. As occasional individual black-legged kittiwakes have reddish legs, any reports of red-legged away from the subarctic Pacific must record all of the other differences, not just the leg color, for acceptance by bird recording authorities.

The red-legged kittiwake feeds on fish such as lanternfish (Myctophidae), squid, and invertebrates. It spends the summer at the cliff breeding colonies, nesting on ledges, and migrates out to sea in September to overwinter in the northwestern Pacific Ocean and the Gulf of Alaska.