Least Auklet illustration
Birdsong field guide

Least Auklet

Aethia pusilla

The Least Auklet is the smallest of all alcids, a diminutive and highly social seabird that congregates in massive, dense colonies on remote volcanic islands.

What it sounds like

A high-pitched, metallic chattering and whistling series of trills.

Reference call, compare with what you heard
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Rec. Steve Hampton · United StatesCC BY-NC-SAXeno-canto

Field notes

  • It is considered the most abundant seabird in North America, with a population numbering in the millions.
  • During the breeding season, these birds emit a potent, citrus-like scent from their feathers that is often compared to tangerines.
  • They possess a specialized sublingual pouch under the tongue used to transport concentrated zooplankton back to their chicks.
  • Unlike many other alcids that dig burrows, they nest deep within the natural crevices of rocky talus slopes.
  • Their plumage exhibits high polymorphism, appearing in light, intermediate, and dark morphs based on the density of breast streaking.
Habitat
Open subarctic oceans and rocky volcanic talus slopes for nesting.
Range
Bering Sea, Aleutian Islands, and Sea of Okhotsk.

Similar & commonly confused birds

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