Black-legged Kittiwake
Rissa tridactyla · Lifer #55
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Photos: 1 Forms: 1
Atlantic (tridactlya)
IS-3
2ISSF, Atlantic/Pacific split. Plumage varies, breeding (SEP-MAR) and non-breeding (MAR-AUG). Breeding has nearly white head, non-breeding has more dusky grey on back of neck with ear mark. Wings differ. M/F similar.