The Great Black-backed Gull (Larus marinus) is the largest gull species in the UK, known for its imposing size, dark plumage, and fierce demeanour. Found along the coastlines, estuaries, and offshore islands of the UK, the Great Black-backed Gull is a formidable predator and scavenger.

Great Black-backed Gulls have a varied diet, feeding on fish, seabirds, small mammals, crustaceans, and even scavenging for carrion and human food waste. They are often seen patrolling coastlines, piers, and harbours, where they can easily access their prey.

Their habitat in the UK includes various coastal environments, from rocky cliffs and sandy beaches to marshes and mudflats, where they can find suitable nesting sites and abundant food sources.

Great Black-backed Gulls are highly aggressive and territorial birds, often seen chasing away smaller gulls and seabirds to monopolise food sources. They are known for their loud, raucous calls and intimidating behaviour, particularly during the breeding season when they fiercely defend their nesting territories.

The average lifespan of a Great Black-backed Gull is around 20 to 25 years, although some individuals may live longer in favourable conditions.

In cultural references, Great Black-backed Gulls may symbolise the rugged beauty of the coast and the harsh realities of the natural world. They may also appear in literature, folklore, and maritime traditions as symbols of strength and resilience.

An interesting fact about Great Black-backed Gulls is their ability to prey on other seabird species, including smaller gulls, terns, and even puffins. Their predatory behaviour has earned them the nickname “Jemmy Ducks” among fishermen and sailors.