Harpy Eagle vs Mute Swan
Harpia harpyja compared with Cygnus olor
Side-by-Side Comparison
| Attribute | Harpy Eagle | Mute Swan |
|---|---|---|
| Scientific Name | Harpia harpyja | Cygnus olor |
| Order | Accipitriformes | Anseriformes |
| Family | Accipitridae | Anatidae |
| Conservation Status | Vulnerable | Least Concern |
| Length | 100.0 cm (39.4 in) | 152.0 cm (59.8 in) |
| Wingspan | 200.0 cm (78.7 in) | 235.0 cm (92.5 in) |
| Weight | 7500.0 g (264.55 oz) | 11000.0 g (388.01 oz) |
| Diet | Arboreal mammals including sloths, monkeys, and opossums, which make up over 70% of the diet. … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| Clutch Size | 2-3 | 5-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Harpy Eagle
Tropical lowland rainforests, requiring large tracts of continuous forest with tall emergent trees for nesting.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Harpy Eagle
Rarely heard; emits mournful whistled screams 'wheee-oo' and low croaking grunts near the nest. Vocalizations poorly documented given its remote Amazonian habitat.
Mute Swan
Despite its name, not truly mute: gives hissing snorts and low grunting when threatened. Wings produce a loud rhythmic whistling throbbing sound in flight.
Geographic Range & Migration
Harpy Eagle
Central and South America from southern Mexico through Brazil and northern Argentina. Range is shrinking due to deforestation.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Conservation Status
Harpy Eagle
Mute Swan
How to Tell Them Apart
Harpy Eagle
Slate-black upperparts and head with a pale grey breast and white underparts with black barring. A distinctive split grey crest rises when the bird is alarmed.
Massive dark hooked bill, one of the largest of any eagle
Mute Swan
All-white plumage in adults. Cygnets are grey-brown, gradually whitening over the first year. Graceful S-curved neck posture is distinctive.
Orange bill with a prominent black knob at the base, larger in males
About These Birds
Harpy Eagle
The harpy eagle is among the most powerful raptors in the world, with talons as large as a grizzly bear's claws. It is the national bird of Panama. Deforestation poses the greatest threat to this species, as each breeding pair requires a vast territory of undisturbed forest.
Mute Swan
The mute swan is one of the heaviest flying birds, with males weighing up to 14 kg. Despite its name, it is not truly mute, producing hissing, grunting, and snorting sounds. Mute swans form lifelong pair bonds and their aggressive defense of nesting territory is well known.