• Skip to Content
  • Skip to Main Navigation
  • Skip to Local Navigation
  • Skip to Search
  • Skip to Sitemap
  • Skip to Footer
Help develop a Bird ID tool!

Rhinoceros Auklet

Cerorhinca monocerata ORDER: CHARADRIIFORMES FAMILY: ALCIDAE

IUCN Conservation Status: Least Concern

Rhinoceros Auklet Photo

Named for the vertical white plate at the base of its bill, the Rhinoceros Auklet is a bird of the coastlines and open seas of the north Pacific. The only member of its genus, it is closely related to puffins.

Learn About Celebrate Urban Birds!
Drink Birds & Beans coffee. Save our birds.

At a GlanceHelp

Measurements
Both Sexes
Length
11–11.4 in
28–29 cm
Wingspan
23.2–24.4 in
59–62 cm
Weight
12.3–21.9 oz
350–620 g
Other Names
  • Alque rinoceros (French)
  • Alcuela rinoceronte (Spanish)

Cool Facts

  • Both male and female Rhinoceros Auklets bear a "horn" on the base of the bill. The function of this feature is not known.
  • The Rhinoceros Auklet delivers food to its nest site largely by night. This behavior may be an adaptation to keep gulls and other species from stealing its food.

Habitat


Ocean

Mostly pelagic; nests on islands in ground burrows.

Food


Fish

Nesting

Nesting Facts
Condition at Hatching
Covered in down, can walk, but stay in nest.
Nest Placement

Burrow

Behavior


Surface Dive

Dives underwater to capture prey, using its wings to swim.

Conservation

status via IUCN

Least Concern

Vulnerable to the effects of oil spills. Raccoons and other introduced mammals have caused catastrophic population losses and possibly total elimination of some colonies.

Credits

  • Gaston, A. J., and S. B. C. Dechesne. 1996. Rhinoceros Auklet (Cerorhinca monocerata). In The Birds of North America, No. 212 (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, PA, sand The American Ornithologists Union, Washington, D.C.

Range Map Help

Rhinoceros Auklet Range Map
View dynamic map of eBird sightings