白头海雕 vs

Haliaeetus leucocephalus compared with Chrysococcus triporus

Taxonomic Classification

Rank	白头海雕
Kingdom	Animalia (动物界)	Chromista (色藻界)
Phylum	Chordata (脊索动物门)	Ochrophyta (淡色藻门)
Class	Aves (鳥綱)	Chrysophyceae (丽生菌纲)
Order	Accipitriformes (鷹形目)	Chromulinales (色金藻目)
Family	Accipitridae (Hawks & Eagles)	Dinobryaceae
Genus	Haliaeetus (Sea Eagles)	Chrysococcus
Species	Haliaeetus leucocephalus	Chrysococcus triporus

Conservation Status

白头海雕

NE — Not Evaluated

Population: ~316.7K

Trend: Increasing ↑

NE — Not Evaluated

Physical Characteristics

Attribute	白头海雕
Diet	Carnivore	—
Average Lifespan	28 years	—
Average Length	90 cm	—
Average Weight	5.0 kg	—

Habitat & Geographic Range

白头海雕

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 Denmark, Norway, and Sweden.

白头海雕

白头海雕是美国国鸟，也是美国生态保护史上的成功案例，曾因滴滴涕（DDT）的广泛使用而濒临灭绝，经保护措施的实施后种群数量已显著恢复。该物种在IUCN红色名录中被评估为无危（LC），以白色头颈和尾羽与深棕色体羽形成的鲜明对比为主要识别特征。它们主要以鱼类为食，也会捕食哺乳动物和腐肉。

Chrysococcus triporus is a unicellular freshwater chrysophyte microalga in the genus Chrysococcus, class Chrysophyceae. The species epithet triporus — three-pored — refers to the presence of three distinct pores in the lorica, the outer proteinaceous or polysaccharide envelope that encloses the Chrysococcus cell. Pore number and arrangement provide useful taxonomic characters in this genus, alongside lorica shape, surface texture, and the presence or absence of additional projections or ornamentation. C. triporus has been recorded from Norwegian and Swedish freshwater environments, fitting the established pattern of chrysophyte diversity in Scandinavian lakes and ponds. Records from Brazil suggest a broader distribution, though it is uncertain whether Scandinavian and South American populations represent a single species or cryptic lineages that require molecular resolution. The species inhabits the limnetic zone of freshwater bodies, contributing to primary production through photosynthesis with chlorophylls a and c and fucoxanthin pigments. The cell body is enclosed within the lorica from which one or two flagella emerge through a specialized opening, enabling active swimming in the water column. Chrysococcus species function as prey for ciliates, flagellates, and zooplankton, linking primary production to higher trophic levels in freshwater food webs. C. triporus may also produce siliceous stomatocysts as resting stages that can persist in sediments. The species has not been formally evaluated under IUCN criteria and retains a conservation status of Not Evaluated.