águia-de-cabeça-branca vs Northern Gannet
Haliaeetus leucocephalus comparado com Morus bassanus
Side-by-Side Comparison
| Atributo | águia-de-cabeça-branca | Northern Gannet |
|---|---|---|
| Nome científico | Haliaeetus leucocephalus | Morus bassanus |
| Ordem | Accipitriformes | Suliformes |
| Família | Accipitridae | Sulidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | 79,0 cm (31.1 in) | 93,0 cm (36.6 in) |
| Envergadura | 203,0 cm (79.9 in) | 180,0 cm (70.9 in) |
| Peso | 4300,0 g (151.68 oz) | 3000,0 g (105.82 oz) |
| Dieta | Primarily fish, also waterfowl, small mammals, and carrion. Hunts by swooping down to snatch fish … | Shoaling fish, especially mackerel, herring, and capelin. Plunge-dives from heights of 30 meters at speeds … |
| Tamanho da postura | 1-4 | 1 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Habitats partilhados
águia-de-cabeça-branca only
Northern Gannet only
Nenhum
águia-de-cabeça-branca
Large bodies of open water including coasts, rivers, and lakes with abundant fish and old-growth trees for nesting.
Northern Gannet
Open ocean and coastal waters. Breeds in dense colonies on steep rocky islands and sea stacks.
Song & Call Comparison
águia-de-cabeça-branca
High-pitched, chattering whistle: a rapid 'kleek-kik-ik-ik-ik'. Surprisingly weak and thin for such a large raptor. Also gives a lower 'kwit-kwit' call near the nest.
Northern Gannet
Loud, harsh 'urrah-urrah' grunting and croaking at breeding colonies on sea stacks. Also gives a softer 'karrr' in flight. Large colonies are extremely noisy during the breeding season.
Geographic Range & Migration
águia-de-cabeça-branca
North America from Alaska and Canada through the contiguous United States to northern Mexico.
Northern Gannet
North Atlantic, breeding from Newfoundland and Gulf of St. Lawrence to Norway, Iceland, and Britain. Winters at sea south to the tropics.
Estado de conservação
águia-de-cabeça-branca
Northern Gannet
How to Tell Them Apart
águia-de-cabeça-branca
Adults have a dark brown body with a striking white head and tail. Juveniles are mottled brown and white, reaching full adult plumage at age five.
Large, hooked, bright yellow bill
Northern Gannet
Brilliant white body with black wingtips and a golden-yellow wash on the head and nape. Blue-grey bill with dark lines and pale blue eye-ring.
Long, straight, pointed, pale blue-grey bill with serrated edges
About These Birds
águia-de-cabeça-branca
The bald eagle is the national bird and symbol of the United States. Once endangered due to DDT pesticide use, it made a remarkable recovery and was removed from the endangered species list in 2007. These powerful raptors build the largest tree nests of any bird, some weighing over two tons.
Northern Gannet
The northern gannet is a spectacular plunge-diver, folding its two-meter wingspan into an arrow shape to hit the water at up to 100 km/h. Air sacs under the skin and a reinforced skull protect it from the impact. Bass Rock in Scotland hosts over 150,000 gannets, the largest single colony of any seabird in the world.