White-tailed Eagle

The White-tailed Eagle is one of the largest eagles on Earth, rivaling the Steller's Sea Eagle in bulk and exceeding the Bald Eagle in average wingspan. It is a close relative of the Bald Eagle, occupying a similar ecological niche across Eurasia as a large fish- and waterbird-eating raptor tied closely to coastlines and inland waters.

Adults are predominantly dark brown across the body and wings, with a pale, almost straw-colored head and neck that can appear nearly white in old individuals. The most diagnostic feature is the short, wedge-shaped, all-white tail, which contrasts sharply with the dark body and is visible at great distances, even in flight silhouette. The bill and eyes are pale yellow in adults, and the powerful, deeply hooked bill is proportionally massive.

In flight, the species shows huge, broad, plank-like wings held flat, with deeply fingered primaries at the wingtips, giving it a distinctive "flying door" profile. Juveniles are much darker overall, mottled brown with variable pale streaking on the underwing and body, and a dark tail that only whitens gradually over four to five years as the bird matures into full adult plumage.

Key Field Marks

• Enormous size with very broad, rectangular wings held flat in a shallow soaring glide
• Short, white, wedge-shaped tail in adults, contrasting with a dark brown body
• Pale, straw-yellow head and neck in mature adults
• Massive yellow bill, larger and more protruding than in similarly sized eagles
• Deeply fingered wingtip primaries visible in flight

Similar Species

The Bald Eagle is smaller-billed and has a fully white head with a sharp demarcation from the dark body, whereas the White-tailed Eagle's head fades more gradually into pale, straw-like tones. Golden Eagles are more uniformly dark with a longer, more tapered tail and golden nape, and they hold their wings in a shallow V (dihedral) rather than flat. Juvenile White-tailed Eagles can be confused with juvenile Golden Eagles, but the White-tailed Eagle's wings are proportionally broader, the tail shorter, and the head and bill larger and more protruding, giving a distinctive "flying door" silhouette.

Habitat

White-tailed Eagles favor coastlines, estuaries, large lakes, reservoirs, and slow-moving rivers with abundant fish and waterbirds. They require tall trees or coastal cliffs for nesting and roosting, typically close to open water.

Range

The species breeds across a broad swath of northern and central Eurasia, from Greenland and Iceland through Scandinavia, continental Europe, Russia, and east to Japan and coastal China. Reintroduction programs have restored breeding populations to Scotland, Ireland, and parts of England after historical extirpation from much of Western Europe.

Migration

Northern populations, particularly those breeding in Scandinavia and Russia, are partial migrants that move south to ice-free coasts and open water in winter. Populations in milder maritime climates, such as coastal Norway and the British Isles, tend to be largely resident year-round.

Behavior

White-tailed Eagles are powerful, opportunistic predators and scavengers. They often hunt by flying low over water or perching at a vantage point before swooping to snatch fish near the surface with their talons, and they readily pirate food from other birds, including Ospreys, in a behavior known as kleptoparasitism.

Voice

The call is a series of loud, harsh, barking or yelping notes, often described as "klee-klee-klee" or a rapid "kri-kri-kri," given especially during territorial displays and at the nest.

Feeding

Fish form the core of the diet, supplemented heavily by waterbirds such as ducks, grebes, and gulls, along with carrion, especially in winter when scavenging on carcasses of deer, seals, or fish offal becomes an important food source.

Nesting and Breeding

Pairs build enormous stick nests, called eyries, in tall trees or on cliff ledges near water, reusing and enlarging the same nest over many years until it can reach massive size. Females typically lay one to three eggs, and the pair shares incubation and chick-rearing duties over a breeding season that spans several months before fledging.