Black-headed Gull vs Common Gull

The Black-headed Gull is best identified by its distinctive black head in breeding plumage, while the Common Gull lacks this feature and has a more uniform gray mantle. Both species can be found in similar habitats, but their plumage provides the most reliable distinction.

1. Breeding Plumage: Look for the black head in Black-headed Gull during breeding season. 2. Mantle Color: Common Gull has a paler gray mantle compared to the Black-headed Gull. 3. Size and Bill: Common Gull is slightly larger and has a bigger bill.

The Common Gull is medium-sized and slightly heavier with a bigger bill compared to the Black-headed Gull.

The Black-headed Gull has a black head during breeding season, which is absent in the Common Gull. The Common Gull has a medium to pale gray mantle, often paler than the Black-headed Gull.