Which description matches the great black-backed gull's ID?

• A. Medium-sized gull with yellow legs
• B. White head with black wings
• C. Very large, black back, pink legs
• D. Bright red bill and green legs

Answer: (C)

Focus on size, mantle color, and leg color. The Great Black-backed Gull is the largest gull along the Maine coast, with a very dark back (mantle) that looks almost black and pink legs. That combination—extra large size, dark back, and pink legs—best matches the description. Other options mix in leg colors or overall features not typical for this species (for example, yellow or green legs, or a white head with black wings), so they don’t fit as well.