Black Guillemot vs Black-tailed Gull

In short

The Black Guillemot and Black-tailed Gull are easily distinguished by their size and plumage. The Black Guillemot is a small seabird with distinctive white wing patches and scarlet legs, while the Black-tailed Gull is a medium-sized gull with a black tail band and yellow legs.

Identification tips

1. Look for the size difference: Black Guillemots are smaller. 2. Check the legs: Black Guillemots have red legs, Black-tailed Gulls have yellow legs. 3. Observe the tail: Black-tailed Gulls have a black tail band. 4. Note the habitat: Black Guillemots are often near rocky shores, while Black-tailed Gulls are more widespread along coastlines.

Size

The Black Guillemot is significantly smaller than the Black-tailed Gull, which is a medium-sized gull.

Plumage

Black Guillemots have black plumage with prominent white wing patches and bright red legs. In contrast, Black-tailed Gulls have grey wings, a white body, and a distinctive black band on the tail.

Behaviour

Black Guillemots are often seen close to shore, diving for fish and invertebrates, while Black-tailed Gulls are more likely to be seen soaring and scavenging along coastlines.

Habitat

Black Guillemots prefer inshore waters and are often found near rocky coastlines. Black-tailed Gulls are typically found along coastal areas, often near human settlements.

Voice

The Black Guillemot has a high-pitched, whistling call, whereas the Black-tailed Gull has a more typical gull-like, harsh call.