Smew
Mergellus albellus · Bird, Vertebrate, Warm-blooded, Wild
Animal Family
Anatidae, order Anseriformes, class Aves
Animal Category
Waterfowl
Breed / Variety
Mergellus albellus (monotypic species, no subspecies)
Conservation Status
IUCN Red List status is Least Concern with a stable population trend. Protected under various international migratory bird treaties.
About This Creature
Small duck species with striking plumage. Adult males in breeding plumage are predominantly white with contrasting black markings including a distinctive black patch around the eyes, a black crest, and black back and wing patterns. Females have a reddish-brown head with a white throat and greyish bodies. Length ranges from 35 to 44 cm with a wingspan of 55 to 69 cm.
Physical Characteristics
Compact body, narrow serrated bill adapted for catching fish, small crest on the head, rounded wings, and prominent webbed feet. Plumage shows extreme sexual dimorphism, with males being bright white and black and females displaying chestnut-brown crowns and grey tones.
Behavior & Temperament
Social outside of the breeding season, often forming small flocks. Migratory, spending winters in milder coastal or inland water bodies. Dives expertly to catch fish and aquatic invertebrates. Forms monogamous pairs during the breeding season.
Habitat & Diet
Origin Region
Northern taiga zones of Eurasia, breeding across northern Scandinavia, Russia, and Siberia; wintering in parts of Europe, central and eastern Asia
Habitat
Taiga forests near sheltered freshwater lakes, rivers, and wetlands during breeding; coastal bays, estuaries, and large inland lakes in winter. Aquatic and aerial locomotion.
Diet & Nutrition
Carnivorous (piscivorous), primarily feeding on small fish, aquatic insects, crustaceans, and occasionally amphibians, foraging mainly by diving underwater.
Lifespan & Health
Lifespan in the wild typically ranges up to 5-10 years. Faces predation from large raptors, mustelids, and avian predators during nesting. Females lay clutches of 6-9 eggs in tree cavities.
Special Characteristics
Known for its diving ability and the male's striking 'panda-like' facial markings. Obligate secondary cavity nester, relying on old woodpecker holes or natural tree hollows near water.
Ecological Information
Acts as an apex predator of small aquatic organisms in its local freshwater habitat, helping regulate fish and invertebrate populations.