Cassin's Auklet vs Crested Auklet

In short

Cassin's Auklet and Crested Auklet are both small seabirds from the Alcidae family, but they can be distinguished by their distinctive features. The Crested Auklet is notable for its conspicuous crest and citrus-like odor, while Cassin's Auklet lacks these traits and has a more subdued appearance.

Identification tips

1. Look for the crest on the Crested Auklet's forehead, absent in Cassin's Auklet. 2. Note the orange bill and white facial plumes of the Crested Auklet during breeding season. 3. Observe behavior: Crested Auklets are more social and engage in group displays. 4. Consider location: Crested Auklets are more common in the Bering Sea, while Cassin's Auklets are found along the Pacific coast.

Size

Both species are small, but the Crested Auklet is slightly larger and more robust than the Cassin's Auklet.

Plumage

Cassin's Auklet has a plain grayish plumage with a paler belly, while the Crested Auklet features a striking crest on its forehead and darker plumage overall. The Crested Auklet also has a distinctive orange bill and white facial plumes during the breeding season.

Behaviour

Crested Auklets are known for their elaborate courtship displays and social behavior, often engaging in group interactions. Cassin's Auklets are more solitary and less conspicuous in their behavior.

Habitat

Both species breed on remote islands, but the Crested Auklet is more commonly found around the Bering Sea, whereas Cassin's Auklet is more widespread along the Pacific coast.

Voice

The Crested Auklet's vocalizations include a series of harsh calls, often heard during social interactions. Cassin's Auklet is generally quieter, with softer calls.