Little Auk
Alle alle
This is the only Atlantic auk of its size, half the size of the Atlantic puffin, at 19–21 cm (7.5–8.3 in) in length, with a 34–38 cm (13–15 in) wingspan. The adult weight ranges from 130–200 g (4.6–7.1 oz). A. a. polaris is marginally larger than the nominate subspecies. In breeding plumage, the head, neck, back, and wings are black, with a white trailing edge to the secondary feathers, and white fringes on the scapular feathers, and pure white underparts. The bill is short and stubby. They have a small rounded black tail. The lower face and fore neck become white in winter plumage.
ID text from Wikipedia, CC BY-SA 4.0

Tufted Puffin
Fratercula cirrhata
Tufted puffins are around 35 cm (14 in) in length with a similar wingspan and weigh about three-quarters of a kilogram (1.6 lbs), making them the largest of all the puffins. Birds from the western Pacific population are somewhat larger than those from the eastern Pacific, and male birds tend to be slightly larger than females. They are primarily black with a white facial patch, and, typical of other puffin species, feature a very thick bill, primarily red with some yellow and occasionally green markings.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Little Auk and Tufted Puffin.