least auklet Aethia pusilla

An abundant tiny auklet, only slightly larger than a sparrow. Occurs in large colonies around rocky shores during summer, and in smaller flocks further from the coast during winter. Summer plumage appears messy with numerous gray spots around the belly. Winter plumage is more contrastingly marked with flashing white belly and shoulders. Gives frequent, consistent squawks and squeaks at colonies. Readily separable from other auklets due to its whiter plumage and smaller size.