ハクトウワシ vs

Haliaeetus leucocephalus compared with Chrysochromulina alifera

Taxonomic Classification

Rank	ハクトウワシ
Kingdom	Animalia (動物)	Chromista (クロミスタ)
Phylum	Chordata (脊索動物)	Haptophyta (ハプト藻)
Class	Aves (鳥類)	Prymnesiophyceae (Prymnesiophyceae)
Order	Accipitriformes (タカ目)	Prymnesiales (Prymnesiales)
Family	Accipitridae (Hawks & Eagles)	Chrysochromulinaceae
Genus	Haliaeetus (Sea Eagles)	Chrysochromulina
Species	Haliaeetus leucocephalus	Chrysochromulina alifera

Conservation Status

ハクトウワシ

NE — Not Evaluated

Population: ~316.7K

Trend: Increasing ↑

NE — Not Evaluated

Physical Characteristics

Attribute	ハクトウワシ
Diet	Carnivore	—
Average Lifespan	28 years	—
Average Length	90 cm	—
Average Weight	5.0 kg	—

Habitat & Geographic Range

ハクトウワシ

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).

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

ハクトウワシ

アメリカの国鳥であり保全の成功を象徴するハクトウワシは翼開長が最大2.4 mに達し、北米全域の水辺近くの森林や湿地に生息する。強力な空中捕食者兼腐肉食者で魚を主食とするが、水鳥や腐肉も捕食する。DDT汚染と狩猟によって1960年代にほぼ絶滅に瀕したが、農薬の使用禁止と絶滅危惧種法の施行により劇的に回復した。

Chrysochromulina alifera is a unicellular haptophyte microalga belonging to the class Prymnesiophyceae, order Prymnesiales, family Chrysochromulinaceae. Like all members of the genus Chrysochromulina, it is characterized by the presence of a coiling haptonema, a unique organelle distinct from flagella that assists in prey capture and surface attachment. C. alifera is a nanoplankton organism, typically ranging from a few micrometers in diameter, and forms part of the phytoplankton communities in marine and occasionally brackish coastal waters. The species was documented from Norwegian and Swedish coastal waters, habitats typical for many Chrysochromulina taxa that were first described by Scandinavian phycologists during the mid-twentieth century surveys of northern European marine microflora. These waters provide cold, nutrient-rich conditions suitable for haptophyte proliferation. C. alifera, like its congeners, likely plays a role in marine carbon cycling and is capable of mixotrophic nutrition, supplementing photosynthesis by ingesting bacteria and small organic particles. The species has not been formally evaluated under IUCN criteria, as microalgal taxa at this taxonomic level are rarely assessed due to difficulties in delimiting populations and determining extinction risk in planktonic organisms. Current conservation status is listed as Not Evaluated. Its ecological significance lies within the broader context of marine microbial food webs, where haptophytes serve as primary producers and food sources for zooplankton and protozoans.