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Side-by-Side Comparison

Attribute	Harpy Eagle	Grey-headed Fish-eagle
Scientific Name	Harpia harpyja	Icthyophaga ichthyaetus
Order	Accipitriformes	Accipitriformes
Family	Accipitridae	Accipitridae
Conservation Status	Vulnerable	Near Threatened
Length	100.0 cm (39.4 in)	—
Wingspan	200.0 cm (78.7 in)	94.2 cm (37.1 in)
Weight	7500.0 g (264.55 oz)	2061.6666666666665 g (72.72 oz)
Diet	Arboreal mammals including sloths, monkeys, and opossums, which make up over 70% of the diet. …	--
Clutch Size	2-3	1-3
Population Trend	—	—

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Size Comparison

Body Length

Harpy Eagle 100.0 cm

Grey-headed Fish-eagle —

Wingspan

Harpy Eagle 200.0 cm

Grey-headed Fish-eagle 94.2 cm

Weight

Harpy Eagle 7500.0 g

Grey-headed Fish-eagle 2061.6666666666665 g

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Habitat Comparison

Shared Habitats

🌲 Forest

Harpy Eagle only

None

Grey-headed Fish-eagle only

🏖️ Coastal 🌿 Wetland

Harpy Eagle

Tropical lowland rainforests, requiring large tracts of continuous forest with tall emergent trees for nesting.

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Song & Call Comparison

Harpy Eagle

Song

Rarely heard; emits mournful whistled screams 'wheee-oo' and low croaking grunts near the nest. Vocalizations poorly documented given its remote Amazonian habitat.

Grey-headed Fish-eagle

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Geographic Range & Migration

Harpy Eagle

Central and South America from southern Mexico through Brazil and northern Argentina. Range is shrinking due to deforestation.

Grey-headed Fish-eagle

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Conservation Status

Vulnerable

Harpy Eagle

Near Threatened

Grey-headed Fish-eagle

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How to Tell Them Apart

Harpy Eagle

Plumage

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.

Bill

Massive dark hooked bill, one of the largest of any eagle

Grey-headed Fish-eagle

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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.

Grey-headed Fish-eagle

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Related Comparisons

Golden Eagle vs Harpy Eagle

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Harpy Eagle vs White-tailed Eagle

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Red-tailed Hawk vs Harpy Eagle

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