Harpy Eagle vs King Penguin
Harpia harpyja compared with Aptenodytes patagonicus
Side-by-Side Comparison
| Attribute | Harpy Eagle | King Penguin |
|---|---|---|
| Scientific Name | Harpia harpyja | Aptenodytes patagonicus |
| Order | Accipitriformes | Sphenisciformes |
| Family | Accipitridae | Spheniscidae |
| Conservation Status | Vulnerable | Least Concern |
| Length | 100.0 cm (39.4 in) | 95.0 cm (37.4 in) |
| Wingspan | 200.0 cm (78.7 in) | 64.0 cm (25.2 in) |
| Weight | 7500.0 g (264.55 oz) | 14000.0 g (493.84 oz) |
| Diet | Arboreal mammals including sloths, monkeys, and opossums, which make up over 70% of the diet. … | Primarily lanternfish and squid caught during deep dives. Routinely dives to 100-300 meters, sometimes exceeding … |
| Clutch Size | 2-3 | 1 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Harpy Eagle
Tropical lowland rainforests, requiring large tracts of continuous forest with tall emergent trees for nesting.
King Penguin
Breeds on sub-Antarctic islands with flat or gently sloping beaches. Forages in the Southern Ocean.
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.
King Penguin
Uses individually unique complex calls for mate and chick recognition in noisy colonies. Produces a loud, musical trumpeting. Chick whistles are distinctive per family unit.
Geographic Range & Migration
Harpy Eagle
Central and South America from southern Mexico through Brazil and northern Argentina. Range is shrinking due to deforestation.
King Penguin
Sub-Antarctic islands including South Georgia, Crozet, Kerguelen, Macquarie, and Falkland Islands.
Conservation Status
Harpy Eagle
King Penguin
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
King Penguin
Dark blue-grey back with white belly. Vivid orange-gold auricular patches on the sides of the head and upper breast. Silvery-grey upperparts.
Long, slender, slightly decurved bill with orange mandible plates
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.
King Penguin
The king penguin is the second-largest penguin species, known for its striking orange-gold head markings. Unlike most penguins, king penguins do not build nests — they incubate their single egg on their feet. Their 14-16 month breeding cycle is the longest of any penguin species.