In temperament it is cheerful, outgoing and friendly with strangers, and its enthusiastic tail action is noted in the breed standard. It matures slowly and keeps a playful, puppyish manner well into adulthood, which has earned it the informal nickname of Peter Pan.
Its build is lithe and athletic, with a long, clean head in which skull and muzzle flow smoothly together. The coat is dense, fine and lies flat, with feathering on the legs and tail. It comes in solid black or liver; yellow sometimes appears but is not accepted for showing.
The Flat-Coated Retriever, first known as the Wavy-coated Retriever, became the favoured working retriever of British gamekeepers in the late nineteenth century, and it is still sometimes called the gamekeeper's dog. After the First World War the Labrador Retriever overtook it in numbers. Following the Second World War a small group of breeders, among them Stanley O'Neill, rebuilt the breed from the few dogs that remained. It was bred to find and carry shot game, both fallen birds on land and ducks from water, working close to the guns and delivering with a soft mouth.