Gavión Atlántico vs Gaviota Californiana

The Great Black-backed Gull is significantly larger than the California Gull, with a bulkier build and a more powerful appearance. The Great Black-backed Gull has a striking black back and wings, while the California Gull has a lighter gray back. These differences are most apparent when the birds are seen side by side.

Size and build: Look for the larger size and bulkier build of the Great Black-backed Gull. Plumage: Note the black back of the Great Black-backed Gull compared to the gray back of the California Gull.

The Great Black-backed Gull is much larger and bulkier than the California Gull.

The Great Black-backed Gull has a black back and wings, contrasting with the California Gull's lighter gray back.