Measurements
Both Sexes
- Length
- 9.1 in
23 cm - Weight
- 5.3–7.1 oz
150–200 g
Other Names
- Starique de Cassin (French)
- Alcuela norteamericana (Spanish)
Cool Facts
- The Cassin's Auklet is the only alcid known to produce two broods in a single breeding season, at least in the southern part of the range where birds may be seen at nesting colonies every month of the year.
- Vulnerable to predators, especially large gulls, the Cassin's Auklet tends to visit its nest at night.
Habitat
Ocean
Food
Insects
Nesting
Nest Placement
Burrow
Behavior
Surface Dive
Dives underwater to capture prey, using its wings to swim.
Conservation
Least Concern
Negatively affected by introduced predators (foxes) on nesting islands.
Credits
- Manuwal, D. A. and A. C. Thoresen. 1993. Cassin's Auklet (Ptychoramphus aleuticus). In The Birds of North America, No. 50 (A. Poole and F. Gill, Eds.) .Philadelphia: The Academy of Natural Sciences; Washington, D.C.: The American Ornithologists' Union.