pigargo-americano vs Clustered Stonewort

Haliaeetus leucocephalus compared with Tolypella glomerata

Key Differences

pigargo-americano is Not Evaluated while Clustered Stonewort is Vulnerable.

Taxonomic Classification

Rank	pigargo-americano	Clustered Stonewort
Kingdom	Animalia (Animals)	Plantae (plantas)
Phylum	Chordata (cordados)	Charophyta (Charophyta)
Class	Aves (ave)	Charophyceae (Charophyceae)
Order	Accipitriformes (Hawks & Eagles)	Charales (Charales)
Family	Accipitridae (Hawks & Eagles)	Characeae
Genus	Haliaeetus (Sea Eagles)	Tolypella
Species	Haliaeetus leucocephalus	Tolypella glomerata

Conservation Status

pigargo-americano

NE — Not Evaluated

Population: ~316.7K

Trend: Increasing ↑

Clustered Stonewort

VU — Vulnerable

Physical Characteristics

Attribute	pigargo-americano	Clustered Stonewort
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).

Clustered Stonewort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Clustered Stonewort

Tolypella glomerata, the clustered stonewort, is a charophyte alga in the family Characeae, found in calcareous, nutrient-poor freshwater habitats including lakes, ponds, ditches, and slow-flowing water in northwestern and northern Europe. Charophytes are macroscopic green algae with a distinctive whorl-like arrangement of branches and a complex, plant-like structure that distinguishes them from other algae. T. glomerata is encrusted with calcium carbonate deposits (hence 'stonewort'), giving it a pale, grey-green appearance and rough texture. The species colonizes clear, low-nutrient water over fine sediment or gravel substrates where competition from vascular plants is reduced by nutrient limitation. It is listed as Vulnerable by the IUCN, reflecting significant declines driven by eutrophication (nutrient enrichment from agriculture and sewage), which promotes the growth of vascular plants and phytoplankton that shade out stoneworts. Drainage, water abstraction, and peat cutting also threaten its habitats. Charophyte diversity has declined substantially across lowland Europe and North America over the past century, with many species becoming locally extinct from sites they once colonized.