pigargo-americano vs common hydra

Haliaeetus leucocephalus compared with Hydra vulgaris

Taxonomic Classification

Rank	pigargo-americano	common hydra
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (cordados)	Cnidaria (cnidários)
Class	Aves (ave)	Hydrozoa (Hydrozoa)
Order	Accipitriformes (Hawks & Eagles)	Anthoathecata (Anthoathecata)
Family	Accipitridae (Hawks & Eagles)	Hydridae
Genus	Haliaeetus (Sea Eagles)	Hydra
Species	Haliaeetus leucocephalus	Hydra vulgaris

Evolutionary Relationship

pigargo-americano and common hydra share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

pigargo-americano

NE — Not Evaluated

Population: ~316.7K

Trend: Increasing ↑

common hydra

NE — Not Evaluated

Physical Characteristics

Attribute	pigargo-americano	common hydra
Diet	Carnivore	—
Average Lifespan	28 years	—
Average Length	90 cm	—
Average Weight	5.0 kg	—

Habitat & Geographic Range

pigargo-americano

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).

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

pigargo-americano

A ave nacional dos Estados Unidos e símbolo do sucesso conservacionista americano, a águia-careca tem uma envergadura de até 2,4 metros e habita florestas e zonas húmidas próximas de águas abertas em toda a América do Norte. Quase extinta na década de 1960 devido ao envenenamento por DDT e à caça, recuperou de forma notável após as proibições de pesticidas e a Lei das Espécies em Perigo.

common hydra

<em>Hydra vulgaris</em>, commonly known as the common hydra, is a small freshwater cnidarian in the family Hydridae. Its conservation status has not been formally evaluated by the IUCN. The species is recorded from Denmark, Norway, and Sweden, with its native range understood to encompass Europe broadly. It typically inhabits slow-moving or still freshwater bodies such as ponds, lakes, and streams, where it attaches to aquatic vegetation or submerged substrates. The common hydra is notable for its remarkable regenerative capabilities and has been the subject of substantial biological research. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden