Yellow-footed Gull vs Great Black-backed Gull

In short

The Yellow-footed Gull and Great Black-backed Gull can be distinguished by their leg color and back tone. The Yellow-footed Gull has yellow legs and a medium gray back, while the Great Black-backed Gull has pink legs and a darker, almost black back. Both species are large gulls, but the Great Black-backed Gull is generally larger.

Identification tips

1. Check leg color: Yellow-footed Gull has yellow legs; Great Black-backed Gull has pink legs. 2. Observe back color: Yellow-footed Gull has a medium gray back; Great Black-backed Gull has a dark, almost black back. 3. Consider size: Great Black-backed Gull is larger and more robust. 4. Note habitat: Yellow-footed Gull is more likely in the Gulf of California, while Great Black-backed Gull is found along the North Atlantic coast.

Size

The Great Black-backed Gull is larger and bulkier than the Yellow-footed Gull.

Plumage

Yellow-footed Gull has a medium gray back and yellow legs, whereas the Great Black-backed Gull has a darker, almost black back and pink legs.

Behaviour

Both species are opportunistic feeders, but the Great Black-backed Gull is more likely to be seen preying on other birds or scavenging in human-altered environments.

Habitat

Yellow-footed Gulls are typically found in the Gulf of California, while Great Black-backed Gulls are more widespread along the North Atlantic coast, often found near human settlements.