White-winged Tern

Identification

The white-winged tern is a small tern with distinctive plumage that varies markedly between seasons. In breeding plumage, adults display a striking appearance: a black head and neck, pale grey back, and very dark grey wings contrasted by white inner wings that give the species its name. The rump is white, the tail light grey and often appearing square-shaped, and the short red legs and stubby black bill (22–25 mm) are characteristic features. The face carries a yellowish tinge. In non-breeding plumage, the dramatic black markings are largely replaced by white and pale grey, though a dark triangular patch forward of the eye and blackish crown remain. A pronounced white collar and pale rump create a distinctive dark brown "saddle" across the mantle, which is particularly evident in juveniles and moulting birds.

Range & habitat

This species is widely distributed across the world, breeding in freshwater marshes from southeast Europe through Central Asia to the Russian Far East. They typically nest on floating vegetation or on ground immediately adjacent to water, constructing nests from reed stems and vegetation, usually laying 2–4 eggs. Following breeding season, white-winged terns undertake significant migrations, wintering across Africa, southern Asia, and Australia. They are scarce vagrants to North America, appearing primarily on the Atlantic coast, with occasional records from the Pacific coast and the Great Lakes region. The species has also been recorded as a vagrant in South America, including Argentina, Brazil, Uruguay, and Colombia.

Behaviour & diet

Unlike the diving terns of the genus Sterna, white-winged terns are "marsh" terns that employ a distinctive foraging technique: they fly slowly and deliberately over water surfaces to pick items from the water and snatch insects from the air, rather than plunging beneath the surface. Their shallow, leisurely wing-beats are characteristic of this unhurried hunting style. The diet consists primarily of insects and small fish. The species is listed under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA), reflecting its importance as a migratory species requiring international conservation attention.

Best time & places to see it

White-winged terns are best encountered during their breeding season in freshwater marsh habitats across southeast Europe, Central Asia, and the Russian Far East. Outside the breeding season, they disperse widely across Africa, southern Asia, and Australia. For observers in North America, vagrant birds may appear during migration, particularly along the Atlantic coast, though sightings are scarce. Winter months offer opportunities to locate the species in its African and Asian wintering grounds, where they favour shallow freshwater bodies.

Photography tips

The stark contrast between breeding and non-breeding plumages offers varied photographic opportunities throughout the year. Capture the breeding bird's bold black head and neck against pale wings and white rump for dramatic effect. The species' characteristic low, leisurely flight over water makes tracking relatively manageable compared to diving terns. Position yourself near marsh edges and shallow water bodies where they hunt, allowing you to photograph their distinctive surface-picking and insect-catching techniques. The small size and delicate appearance benefit from good light and patient positioning to reveal fine plumage details.