Great Black-backed Gull
Larus marinus 大黑背鸥
The Great Black-backed Gull (Larus marinus) is the world’s largest gull, measuring about 32 inches (64–79 cm) in length with a wingspan of 1.5–1.7 m. It has a powerful build, black back and wings, white underparts, pink legs, a heavy yellow bill with a red spot, and a pale yellow eye.
- First spotted
- 14 Mar 2026
- Seen at
- Boston, MA
- Group
- Water
Field marks
- Length
- 32 in · 81 cm
- Colours
- Black · Brown · Gray · Pink · Red · White · Yellow
- Wings
- Broad · Pointed · Tapered
- Tail
- Rounded · Short · Square-tipped
- In flight
- Direct Flight · Flap/Glide · Soaring
- Movement
- Resident
- World population
- 370,000