Black-legged Kittiwake vs Ivory Gull

In short

The Black-legged Kittiwake and Ivory Gull can be distinguished by their leg color and overall plumage. The Kittiwake has black legs and a gray mantle, while the Ivory Gull is entirely white with black legs. Both species are similar in size, but their habitats and behaviors offer additional clues.

Identification tips

1. Look for leg color: Black-legged Kittiwake has black legs, while the Ivory Gull also has black legs but is entirely white. 2. Check the plumage: Kittiwakes have a gray mantle, whereas Ivory Gulls are pure white. 3. Consider the habitat: Kittiwakes are coastal, often on cliffs, while Ivory Gulls are in Arctic pack ice regions.

Size

Both species are similar in size, with the Ivory Gull appearing slightly more robust due to its stout bill.

Plumage

The Black-legged Kittiwake has a gray mantle and white underparts with black wingtips, while the Ivory Gull is entirely white, which is a key distinguishing feature.

Behaviour

The Ivory Gull is known for its opportunistic and aggressive feeding behavior, often seen in pack ice habitats, whereas the Kittiwake is more coastal and less aggressive.

Habitat

The Black-legged Kittiwake is typically found in coastal environments, often nesting on cliffs, whereas the Ivory Gull is associated with Arctic pack ice and can be found in more remote, icy habitats.