Western Bird Guide: Birds of the Rockies and West to the Pacific

by Charles K. Reed

RHINOCEROS AUKLET.

15. Cerorhinca monocerata. 11 inches.

These birds have a much smaller bill than the [Puffins]; in the summer plumage there is a small horn at the base of the bill from which it is given its name. These birds do not stand upright as do the Puffins; but sit upon their tarsus.

Nest.—A single egg is laid in either burrows or in crevices of the rocks, usually without any attempt at nest making (2.70 × 1.80).

Range.—Coast and islands of the northern Pacific. Breeds from Oregon to northern Alaska.