ハシグロアビ vs ハシジロアビ

Gavia immer compared with Gavia adamsii

Key Differences

• ハシグロアビ is Not Evaluated while ハシジロアビ is Near Threatened.

Taxonomic Classification

Rank	ハシグロアビ	ハシジロアビ
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Aves (鳥類)	Aves (鳥類)
Order same	Gaviiformes (アビ目)	Gaviiformes (アビ目)
Family same	Gaviidae	Gaviidae
Genus same	Gavia	Gavia
Species	Gavia immer	Gavia adamsii

Evolutionary Relationship

ハシグロアビ and ハシジロアビ share a common ancestor at the Genus level: Gavia.

Conservation Status

ハシグロアビ

NE — Not Evaluated

ハシジロアビ

NT — Near Threatened

Physical Characteristics

Attribute	ハシグロアビ	ハシジロアビ
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

ハシグロアビ

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

ハシジロアビ

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

ハシグロアビ

<em>Gavia immer</em>, the common loon or great northern diver, is a large aquatic bird in the family Gaviidae, known for its haunting, yodeling calls across northern lakes. It is found in Belgium, Denmark, Norway, Sweden, and the United States, breeding on freshwater lakes in boreal and subarctic regions and wintering along marine coastlines. The common loon is adept in aerial, terrestrial, and aquatic environments, though it is most highly specialized for diving, using its strong feet positioned far back on its body to pursue fish underwater. It typically feeds on fish, supplemented by crustaceans and aquatic invertebrates. Its striking summer plumage features a black-and-white checkered back and a deep black head with a characteristic white necklace pattern. The species has not been evaluated for IUCN conservation status. Common loons require clear, fish-rich lakes for successful breeding and are sensitive to water quality degradation and human disturbance at nesting sites. Their distinctive calls are emblematic of wilderness in North America and Scandinavia.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden