Common Pochard
Aythya ferina
The Common Pochard is a medium-sized diving duck belonging to the Anatidae family. In breeding plumage, the male is characterized by a distinctive chestnut-red head, a black breast, and a pale grey body. It prefers nutrient-rich standing waters with a minimum depth of one meter and vegetation-rich shorelines. The species is a partial migrant, with northeastern populations migrating to Southern and Western Europe during winter.
Details
Identification
Male with red head, black breast, and grey body. Female grey-brown with a pale eye-ring and a pale band on the blue-grey bill.
Social behavior
Highly gregarious, forming large flocks outside the breeding season, often together with Tufted Ducks; sexes often segregate during winter.
Diet
Omnivorous; feeds on seeds, tubers, and leaves of aquatic plants as well as insect larvae, mollusks, and small crustaceans.
Hunting strategy
Actively dives for food, usually at depths of 1 to 3 meters; also uses dabbling in shallow water.
Overwintering
Wintering on ice-free inland waters, larger lakes, or in sheltered coastal areas.
Ecology
Ecological role
Consumer of aquatic macrophytes and invertebrates; serves as prey for predators and contributes to seed dispersal.
Natural predators
Fox, mustelids, Marsh Harrier, White-tailed Eagle; additionally pike and large gulls for ducklings.
Competitor species
Tufted Duck, Red-crested Pochard (overlap in foraging habitats).
Ecosystem service
Regulation of aquatic plant populations and transport of nutrients and plant seeds between different water bodies.
Threats
Loss of wetlands, disturbance from recreational activities, lead poisoning from fishing weights/shot, climate change, and eutrophication of waters.
Scientific profile
Morphology & ID
Breeding plumage
Breeding plumage of male: Chestnut-red head and neck, black breast and tail coverts, body pale grey with fine vermiculations. Female: Cryptic grey-brown, paler areas at the bill base and throat, greyish back.
Non-breeding plumage
Eclipse plumage of male resembles the female but is generally greyer and retains the reddish eye color. The plumage appears more washed out than in breeding dress.
Juvenile plumage
Similar to female but more uniformly brown, less contrast between head and body, eye color initially brownish.
Sexual dimorphism
Strongly pronounced; males in breeding plumage are highly contrasting (red, black, grey), females are cryptically colored brown-grey.
Distinguishing features
Characteristic wedge-shaped head profile with a sloping forehead merging directly into the bill. Red iris in adult males. Pale blue band on the bill.
Confusion species
Ferruginous Duck (Aythya nyroca) - smaller, white eye, darker body; Red-crested Pochard (Netta rufina) - bulkier head, red bill.
Bill
Medium length, dark grey to black with a prominent pale blue to blue-grey transverse band before the black tip.
Vocalization
Song
During courtship, a soft, whistling 'whee-oo' or 'oo-oo-oo' by the male.
Call
Female utters a harsh, low 'krrr-krrr' or 'ga-ga-ga', especially in flight or when disturbed.
Distribution & migration
Breeding range
Palearctic; distributed from Western Europe through Central Europe to Central Asia and Southern Siberia.
Wintering range
Western and Southern Europe (Mediterranean), North Africa, Middle East, and South and East Asia.
Migration details
Partial to medium-distance migrant. Distinct moult migration of males in summer to large, food-rich water bodies (e.g., Ismaning reservoirs, Lake Constance).
Habitat
Breeding habitat
Eutrophic standing waters with extensive reed beds (Phragmites), sedge marshes, and water depths of 1-4 meters. Prefers vegetation-rich shorelines.
Foraging habitat
Open water surfaces of lakes, ponds, and slow-moving rivers; in winter also in brackish water and coastal lagoons.
Breeding biology
Nest construction
Substantial bowl made of reeds, sedges, and other aquatic plants, usually in dense reed beds or on floating vegetation mats, thickly lined with dark down.
Eggs
Greenish-grey to olive, smooth, slightly glossy, approx. 61 x 44 mm in size.
Parental care
Sole incubation and brood rearing by the female; young are precocial and begin foraging independently early on.
Diet & behaviour
Diet breeding
Omnivorous: aquatic plants (seeds, roots, tubers of Potamogeton), insect larvae (chironomids), mollusks, and small crustaceans.
Diet winter
Predominantly plant-based, especially stoneworts (Characeae) and pondweeds.
Feeding technique
Diving (up to 4m depth), upending in shallower water, straining at the water surface.
Foraging strategy
Active diving for benthic organisms and macrophytes on the water body floor.
Sociality
Highly gregarious; forms large flocks outside the breeding season, often associated with Tufted Ducks.
Flock behaviour
Formation of dense flocks on open water surfaces for resting and foraging; synchronized diving behavior observable.
Protection & threats
Main threats
Habitat loss through drainage, eutrophication (decline of stoneworts), lead poisoning from lead shot, disturbance from water sports, hunting pressure in some regions.
Population trend
Decreasing; significant decline in breeding populations in Europe since the 1990s (IUCN Red List status 'Vulnerable' since 2015).
Conservation measures
Protection and restoration of wetlands, ban on lead shot in wetlands (EU-wide), hunting management, reduction of nutrient input into breeding waters.