Pigeon Guillemot vs Common Guillemot

In short

The Pigeon Guillemot and Common Guillemot are both members of the Alcidae family, but they can be distinguished by their structure and plumage. The Pigeon Guillemot has a distinctive white wing patch and red legs, while the Common Guillemot is more uniformly dark with a slender bill. Both species are found in coastal regions, but their habitats and behaviors differ slightly.

Identification tips

1. Look for the white wing patch and red legs of the Pigeon Guillemot. 2. Note the slender bill and uniformly dark plumage of the Common Guillemot. 3. Consider habitat: Pigeon Guillemots prefer rocky coastlines, while Common Guillemots are often on cliffs or open seas. 4. Observe behavior: Pigeon Guillemots dive to the seabed, while Common Guillemots may be seen in larger groups.

Size

Both species are similar in size, but the Common Guillemot is slightly larger and bulkier.

Plumage

The Pigeon Guillemot has a striking white wing patch and red legs, contrasting with its dark body. In contrast, the Common Guillemot is more uniformly dark with a white underbelly and lacks the white wing patch.

Behaviour

Pigeon Guillemots generally feed inshore, diving to the sea bed to probe rocky recesses. Common Guillemots often form large colonies and are more pelagic outside the breeding season.

Habitat

Pigeon Guillemots are found along rocky coastlines and islands, particularly in the Pacific. Common Guillemots are more widespread in the North Atlantic, often seen on cliffs and open seas.

Voice

Vocalizations are not a primary distinguishing feature in the field; both species have similar calls, but Pigeon Guillemots may have a higher-pitched, more varied repertoire.