Белоголовый орлан vs Columbia River Signal Crayfish

Haliaeetus leucocephalus compared with Pacifastacus leniusculus

Taxonomic Classification

Rank	Белоголовый орлан	Columbia River Signal Crayfish
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum	Chordata (хордовые)	Arthropoda (членистоногие)
Class	Aves (птицы)	Malacostraca (высшие раки)
Order	Accipitriformes (ястребообразные)	Decapoda (десятиногие ракообразные)
Family	Accipitridae (Hawks & Eagles)	Astacidae
Genus	Haliaeetus (Sea Eagles)	Pacifastacus
Species	Haliaeetus leucocephalus	Pacifastacus leniusculus

Evolutionary Relationship

Белоголовый орлан and Columbia River Signal Crayfish share a common ancestor at the Kingdom level: Animalia. (животные)

Conservation Status

Белоголовый орлан

NE — Not Evaluated

Population: ~316.7K

Trend: Increasing ↑

Columbia River Signal Crayfish

NE — Not Evaluated

Physical Characteristics

Attribute	Белоголовый орлан	Columbia River Signal Crayfish
Diet	Carnivore	—
Average Lifespan	28 years	—
Average Length	90 cm	—
Average Weight	5.0 kg	—

Habitat & Geographic Range

Белоголовый орлан

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).

Columbia River Signal Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Widely distributed across Asia (Japan), Europe (26 countries), and North America (United States).

Белоголовый орлан

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.

Columbia River Signal Crayfish

<em>Pacifastacus leniusculus</em>, the Columbia River signal crayfish, is a freshwater crustacean in the family Astacidae native to the Pacific Northwest of North America and widely introduced across Europe, Japan, and other regions. This species has not been evaluated by the IUCN but is recognised as one of the most ecologically damaging invasive freshwater species in Europe, present in 26 European countries, Japan, and its native range in the United States. Signal crayfish are large, aggressive, and highly fecund, capable of displacing native crayfish species through competition and through transmission of crayfish plague, a disease caused by the oomycete <em>Aphanomyces astaci</em>, to which North American crayfish have evolved resistance but European species have not. This species inhabits a wide range of freshwater environments including rivers, streams, lakes, and estuaries, as well as adjacent terrestrial habitats. Signal crayfish are omnivores, consuming aquatic plants, invertebrates, fish eggs, and organic detritus, and their burrowing activity can destabilise stream banks and increase turbidity. Management of invasive populations is a major focus of freshwater conservation in Europe. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 9 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇵🇱 Poland 🇸🇪 Sweden 🇬🇧 United Kingdom 🇺🇸 United States