Least Auklet vs Whiskered Auklet

The Least Auklet and Whiskered Auklet are both small seabirds that nest in rock crevices and feed on zooplankton. The most reliable field mark is the facial ornamentation: Least Auklets have white facial plumes and a colorful bill with a horny bill-knob, while Whiskered Auklets are distinguished by their prominent whisker-like feathers.

Facial features: Look for the white facial plumes and colorful bill with a knob on the Least Auklet, versus the whisker-like feathers on the Whiskered Auklet. Plumage: Note the variation in breast color in Least Auklets, which can range from white to black. Breeding sites: Both species nest in rock crevices, often in close proximity to each other, which may require careful observation of facial features for accurate identification.

Least Auklets exhibit a range of plumage from white to nearly black on the breast, often with spotted intermediates. Whiskered Auklets are noted for their distinctive whisker-like feathers on the face.