Pomarine Skua vs Black Guillemot

In short

The Pomarine Skua and Black Guillemot are distinct in both appearance and habitat preference. Pomarine Skuas are large, predatory seabirds often seen offshore, while Black Guillemots are smaller, coastal birds with striking white wing patches and red legs.

Identification tips

• Size and shape: Pomarine Skua is larger and more robust; Black Guillemot is smaller and more compact.
• Plumage: Look for the Black Guillemot's distinctive white wing patches and red legs.
• Habitat: Pomarine Skuas are more likely offshore, while Black Guillemots stick to coastal areas.
• Behavior: Pomarine Skuas may be seen chasing other birds; Black Guillemots dive for food near the coast.

Size

Pomarine Skua is larger and bulkier compared to the smaller, more compact Black Guillemot.

Plumage

Pomarine Skua has variable plumage with dark and light morphs, though dark morphs are rare. Black Guillemot is recognizable by its black plumage with white wing patches and bright red legs and feet.

Behaviour

Pomarine Skuas are aggressive predators and kleptoparasites, often chasing other birds for food. Black Guillemots are more solitary, diving for fish and invertebrates near the coast.

Habitat

Pomarine Skuas are typically found offshore and breed in the Arctic tundra. Black Guillemots prefer inshore waters and rocky coastlines, often staying near breeding sites year-round.