[2] There are three subspecies:[3] The head, body, and tail of an adult silver gull are white, and the wings are light grey with white-spotted, black tips.

[4] It is a common species near human habitations and beaches, having adapted well to urban environments and thriving around shopping centres and garbage dumps.

[4] Silver gulls have twice been recorded in the United States; one bird was shot in August 1947 at the mouth of the Genesee River, Lake Ontario, and another was photographed in Salem County, New Jersey, in autumn 1996.

[4] The silver gull naturally feeds on worms, fish, insects and crustaceans.

[4] Breeding occurs from August to December, typically in large colonies on offshore islands.