Grey Gull vs Belcher's Gull

In short

The Grey Gull and Belcher's Gull can be differentiated primarily by their plumage and habitat preferences. Grey Gulls are adapted to desert environments with their uniform grey plumage, while Belcher's Gulls have a more contrasting plumage with a distinctive black tail band.

Identification tips

• Plumage: Look for the uniform grey of the Grey Gull versus the contrasting plumage with a black tail band of the Belcher's Gull.
• Habitat: Consider the location; Grey Gulls are more likely inland in desert areas, while Belcher's Gulls are coastal.
• Behavior: Note the nesting behavior; Grey Gulls nest inland, Belcher's Gulls are coastal nesters.

Size

Both species are similar in size, typical of medium-sized gulls, but specific measurements are not provided.

Plumage

Grey Gulls have a uniform grey plumage which helps them in desert environments, whereas Belcher's Gulls have a more contrasting appearance with a white head and underparts, grey wings, and a black tail band.

Behaviour

Grey Gulls are known for their unique inland desert nesting behavior, commuting to the sea for food, while Belcher's Gulls are more coastal in their habits.

Habitat

Grey Gulls nest in the extreme deserts of northern Chile, while Belcher's Gulls are typically found along the Pacific coast.