Western Gull vs Great Black-backed Gull
Larus occidentalis versus Larus marinus
Play a quiz with Western Gull and Great Black-backed Gull
Western Gull
Great Black-backed Gull
In short
The Western Gull and Great Black-backed Gull can be distinguished by their size and plumage. The Great Black-backed Gull is notably larger and has a darker back compared to the Western Gull. Both species are found in coastal habitats, but their ranges do not typically overlap.
Identification tips
- Compare the size: the Great Black-backed Gull is larger. 2. Look at the back color: the Great Black-backed Gull has a darker back. 3. Consider the location: Western Gulls are on the West Coast, Great Black-backed Gulls on the East Coast.
Size
The Great Black-backed Gull is significantly larger than the Western Gull, making size a reliable distinguishing feature when both species are present.
Plumage
The Great Black-backed Gull has a very dark, almost black back, while the Western Gull has a lighter gray back. This contrast in back coloration is a key field mark.
Habitat
The Western Gull is primarily found along the West Coast of North America, while the Great Black-backed Gull is more common along the East Coast and has expanded its range southward.