DESCRIPTION: Steller’s Sea-Eagle is one of the largest raptors in the world. Where these birds feed on carrion, they are subject to lead poisoning. The Stellers sea-eagle is often easy to spot, with its dark body; white forehead, shoulders, tail, and thighs; and bright-yellow bill. Introducing "One Thing": A New Video Series, The Spruce Gardening & Plant Care Review Board, The Spruce Renovations and Repair Review Board, carnivorous and eat a wide variety of prey. It is believed that they are glacial relics that evolved in the … A small number of birds remain in Kamchatka over the winter but the majority fly south to the Kuril Islands, Russia and Hokkaidō, Japan. The body is black-brown with a prominent white patch on the shoulders. They may even join mixed flocks with golden eagles and white-tailed eagles while feeding. These eagles are believed to have a lifespan of about 20 years or more. These eagles are exceptionally vocal for raptors and have a throaty, raspy bark-like call that sounds much like typical gull calls. Great relatives of the Steller's sea-eagle include: Don't miss any of our other wild bird fact sheets and profiles to learn about other popular raptors and different bird species! Younger birds also have smaller, paler bills. The yellow eyes are surrounded by a fleshy yellow eye ring, though it can be difficult to see. One of the heaviest raptors in the world, the Steller's sea-eagle can weigh up to 20 pounds. In winter, however, they will gather in communal roosts near rich food sources, such as fish spawning grounds or rare areas of open water. The current population is estimated at 5,000 and decreasing. The wedge-shaped tail and undertail coverts are plain white. In terms of weight and size, the Steller’s Sea Eagle and the Harpy Eagle are the largest. Steller's sea eagle is the largest bird in the genus Haliaeetus and is one of the largest raptorsoverall. Steller’s sea eagle (Haliaeetus pelagicus) average weight: 6.7 kg (15 lb) maximum weight: 9 kg (20 lb) 2. In Russian, the eagle has been called morskoi orel (sea eagle), pestryi morskoi orel (mottled sea eagle) or beloplechii orlan (white-shouldered eagle). In flight, this eagle's wings show prominent primary feather fingers. BIOMETRICS: Length : 85-94 cm Wingspan : 220-250 cm Weight : M : 5-6 kg – F : 7-9 kg. Eagle of the sea: Often called the worlds most magnificent bird of prey, the Stellers sea-eagle is dark, impressive, the largest of all sea-eagles, and the heaviest known eagle. Steller's sea-eagles are carnivorous and eat a wide variety of prey, including fish, waterfowl, larger birds, and mammals, and they will also occasionally eat carrion. There are no known predators of adult Steller’s sea eagles. Typically, a pair will maintain two to four nests in one breeding territory and use alternate nests from year to year. Eggs and hatchlings are commonly preyed on by arboreal mammals that gain access to nests, such as martens, and by crows. In Japanese, it is called ō-washi (large eagle or great eagle). She has over 16 years experience writing about wild birds for magazines and websites. Eaglets are covered in white down, but as they mature, juvenile birds develop darker, more uniform brown-black plumage. They may even stand in shallow water and snatch fish with their bills, and they often steal from other eagles or ospreys. Females vary in weight from 6,2 to 9,5 kg (13.5 to 21 lb), while males being rather lighter with a weight range of 4,9 to 6,8 kg (10.8 to 15 lb). Their pitch is higher than would be expected for a bird of their size, and they often call while fighting over food or just while flying. They are legally protected, being classified as a National Treasure in Japan and mostly occurring in protected areas in Russia. These large raptors are not backyard birds, but they will readily visit areas where prey is abundant, particularly salmon and trout. This species is also occasionally seen in North America, China, and North and South Korea. Visiting popular fishing areas within the eagles' range is another way to see Steller's sea-eagles. Steller’s sea eagles are monogamous, they are often seen in breeding pairs throughout the breeding season, usually lasting from February through August. Females vary in weight from 6,2 to 9,5 kg (13.5 to 21 lb), while males being rather lighter with a weight range of 4,9 to 6,8 kg … In some areas, they are persecuted by fur trappers because the eagles may occasionally raid traps. The legs are feathered with white bloomers, and the feet are yellow with black talons. They are dark but dramatically colored with white tail, shoulders, rump, thighs and forehead. In winter, they may also be found near coastal lagoons or in areas where fish are spawning. These raptors use both soaring flight and powered flapping flight, and they can be quite agile in the air. Steller’s sea eagle can range in total length from 85 to 105 cm (2 ft 9 in to 3 ft 5 in), apparently males average about 89 cm (2 ft 11 in) in length, while females average about 100 cm (3 ft 3 in), marginally shorter on average than the harpy eagle and about 65 mm (2.6 in) shorter than the Philippine eagle. They prefer rocky coastal habitats and are also found inland along large rivers with craggy edges and mature trees. All eagle species are part of the Accipitridae bird family, along with hawks, kites, harriers, goshawks, and buzzards. As is typical of birds of prey, the male is much smaller than the female and will weigh from 11 to 13 pounds. Eggs hatch between May and June, with fledging taking around 70 days. Steller’s sea eagle (Haliaeetus pelagicus) is a large and beautiful bird of prey. Both males and females secure their own breeding territories early in the season and nest building occurs in February or March. Their favored prey in river habitats are salmon and trout. The average weight is variable, possibly due to seasonal variation in food access or general condition of eagles, but has been reported as high as a mean mass of 7,757 g (17.101 lb) to a median estimate weight of 6,250 g (13.78 lb), excluding expired eagles … With adult females reaching 15 to 20 pounds, and a wingspan of between six to eight feet, the Steller’s size strikes an impressive and imposing figure. Steller’s sea eagle’s wingspan is one of the largest of any living eagle. Interesting facts about cottonmouth snakes (water moccasins), Interesting facts about the Mojave Desert. Like all raptors, they clamp onto prey with talons as sharp as switchblades and cannot let go until the prey is dead. The head is black-brown with white frosting on the crown and nape and a small white patch on the forehead. Adult is very large. Steller’s sea eagle is the largest of all sea eagles and the heaviest known eagle. Steller's Sea Eagle, 250 cm (98.4 inches) Steller’s sea eagle is one of the largest birds of prey found … Steller's sea-eagle eggs are pale greenish-white. Accipitriforme Order – Accipitridae Family. Chicks leave nests by August or September. In winter, some of these raptors migrate as far south as the Korean coast and along the coast of Hokkaido, Japan. Steller’s sea eagle lives near water; on narrow strips of coast, together with forested valleys along lower reaches of rivers. Both adults work together to build a huge, bulky nest of branches and twigs, and the same nest may be reused for many years. With forward-facing eyes, Steller’s sea eagle has a wide field of binocular vision. Steller's sea-eagles are generally solitary and require large territories to support their hunting habits. This distinctive bill is an immediate clue that the bird is an eagle, but birders need to look for other field marks to feel confident about this bird's identification. These are monogamous birds that form pair bonds after soaring courtship flights. Steller’s sea eagle is classified as vulnerable by the International Union for Conservation of Nature (IUCN). This fact sheet can help! They are diurnal and hunt during the day, either diving from a perch to snatch prey with their powerful talons, or else soaring to find their next meal. Learn tips for creating your most beautiful (and bountiful) garden ever. Steller’s sea eagles are not extensively known for their voices, but are known to make a deep barking cry, ra-ra-ra-raurau, in aggressive interactions. 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