Smew

Lifespan

10–15 years in the wild

Size & Weight

38–44 cm, wingspan 59–67 cm; 550–650 g

Habitat

Winter visitor favouring freshwater lakes, reservoirs, and coastal estuaries where it dives for small fish in clear, shallow waters.

UK Distribution

Winter visitor (October to March) found throughout the UK, with larger concentrations in southern England and along coastal regions; scarce breeder in Scotland.

Diet

Primarily small fish including minnows, sticklebacks, and fry; also aquatic insects and crustaceans.

Prey

Small fish (minnows, sticklebacks, perch fry), aquatic insects, and crustaceans

Predators

Foxes, mink, and raptors such as peregrines and white-tailed eagles; chicks vulnerable to gulls and crows.

Mating Season

April to June

Breeding

Clutch of 8–9 eggs, incubation period 24–26 days, single brood; nests in tree cavities or dense vegetation near water.

Behaviour

Things With Wings

Species Profile

Sources and editorial status