Pygargue à tête blanche vs Perruche de Derby

Haliaeetus leucocephalus compared with Psittacula derbiana

Key Differences

• Pygargue à tête blanche is Not Evaluated while Perruche de Derby is Near Threatened.

Taxonomic Classification

Rank	Pygargue à tête blanche	Perruche de Derby
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (oiseau)	Aves (oiseau)
Order	Accipitriformes (Hawks & Eagles)	Psittaciformes (Parrots)
Family	Accipitridae (Hawks & Eagles)	Psittacidae (True Parrots)
Genus	Haliaeetus (Sea Eagles)	Psittacula
Species	Haliaeetus leucocephalus	Psittacula derbiana

Evolutionary Relationship

Pygargue à tête blanche and Perruche de Derby share a common ancestor at the Class level: Aves. (oiseau)

Conservation Status

Pygargue à tête blanche

NE — Not Evaluated

Population: ~316.7K

Trend: Increasing ↑

Perruche de Derby

NT — Near Threatened

Physical Characteristics

Attribute	Pygargue à tête blanche	Perruche de Derby
Diet	Carnivore	—
Average Lifespan	28 years	—
Average Length	90 cm	—
Average Weight	5.0 kg	—

Habitat & Geographic Range

Pygargue à tête blanche

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 10 distinct biome types spanning the Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Europe (8 countries), North America (United States), and South America (Ecuador).

Perruche de Derby

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found across Europe (6 countries). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Pygargue à tête blanche

The national bird of the United States and a symbol of American conservation success, bald eagles have a wingspan of up to 2.4 meters and inhabit forests and wetlands near open water across North America. Powerful aerial predators and scavengers, they specialize in fish but also take waterfowl and carrion. Nearly extinct by the 1960s due to DDT poisoning and hunting, the bald eagle recovered dramatically following pesticide bans and the Endangered Species Act.

Perruche de Derby

One of the largest parakeets in the world, Lord Derby's parakeets display distinctive blue-green plumage with a striking red-and-black banded bill and a long pointed tail reaching over 60 cm. They inhabit montane forests at 1,000–4,000 meters elevation across the eastern Himalayas, southwest China, and northern Myanmar. Listed as Vulnerable due to deforestation and trapping, they are prized aviary birds. They are known to breed cooperatively with related pairs assisting dominant breeders.

Shared Countries

Both species can be found in 6 countries:

🇧🇪 Belgium 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇵🇱 Poland 🇬🇧 United Kingdom