Thick-billed Murres (the Got Milk? bird) are common in the Pribilofs
Common Murres are nearly as numerous and are usually mixed in with Thick-billeds
Three closely related diminutive Alcids breed in the Pribilofs, and are a highlight of any trip there: Least Auklet, Parakeet Auklet, and Crested Auklet (no good photos of the latter).
Least Auklet (first photo on a foggy day)
Parakeet Auklet
Both of the Pacific-coast species of Puffin breed on the Pribilofs
Horned Puffin
Tufted Puffin