Great Black-backed Gull

📍 Local Expert Tip

“The Great Black-backed Gull is the largest gull in the world and a frequent sight anywhere along the tideline and at low tide in the Adur Estuary around the Toll Bridge. Breeds locally but very under-recorded so do keep an eye on local rooftops including on industrial estates.”

🔍 Overview

The largest gull in the world, the Great Black-backed Gull is an imposing predator and scavenger along the Sussex coast.

🪶 Key Identification Features

Size: Very large (64–78 cm)
Plumage: Black upperparts, white head and underparts
Distinctive Marks: Heavy yellow bill with red spot, pink legs
Bill: Thick and powerful
Tail: Broad and white
Flight: Powerful and steady

🗺️ Habitat & Distribution

Coastal harbours, beaches, piers—common around the Adur Estuary, Shoreham Harbour, Brooklands and Brighton Marina.

🎶 Voice & Behaviour

Deep, laughing cries. Dominates feeding frenzies and will prey on smaller birds.

🍴 Diet

Fish, carrion, refuse, smaller birds.

📸 Birding Tip

Easy to pick out from other gulls by size and dark back. Look on groynes or scavenging near fishing boats.