Subject: Great Black-backed Gull, Larius marinus, with Spider Crab

Location:Beach at Old Harbor, Block Island, Rhode Island

Stock Number: 09-25472

Comments: The "great" in the common name refers to this bird's impressive size—it is North America's largest gull. It is often found together with another large gull, the Herring Gull. The two species even form mixed nesting colonies together.