Yellow-footed Gull vs Lesser Black-backed Gull

In short

The Yellow-footed Gull and Lesser Black-backed Gull can be distinguished primarily by leg color and mantle shade. The Yellow-footed Gull has yellow legs and a paler gray mantle, while the Lesser Black-backed Gull has yellow legs but a darker slate-gray mantle.

Identification tips

1. Leg color: Yellow-footed Gull has yellow legs; Lesser Black-backed Gull also has yellow legs but check mantle color for confirmation. 2. Mantle color: Yellow-footed Gull has a paler gray mantle; Lesser Black-backed Gull has a darker slate-gray mantle. 3. Location: Consider geographic range; Yellow-footed Gull is more localized to the Gulf of California. 4. Size and bulk: Yellow-footed Gull is slightly larger and bulkier.

Size

Both species are similar in size, but the Yellow-footed Gull is slightly larger and bulkier.

Plumage

The Yellow-footed Gull has a pale gray mantle, contrasting with the darker slate-gray mantle of the Lesser Black-backed Gull. Both species have white heads and underparts, but the Yellow-footed Gull's head may appear cleaner in non-breeding plumage.

Behaviour

Both species exhibit typical gull behaviors such as scavenging and coastal foraging. There are no significant behavioral differences noted for field identification.

Habitat

Yellow-footed Gulls are primarily found in the Gulf of California, favoring coastal and island habitats. Lesser Black-backed Gulls have a broader range, often found in coastal areas, inland lakes, and urban environments across Europe and North America.

Voice

Vocalizations are not a primary distinguishing feature between these species, as both have typical gull calls.