Ardilla Gris Oriental vs Amerika-aka-ei

Sciurus carolinensis compared with Hypanus americanus

Key Differences

• Ardilla Gris Oriental is Not Evaluated while Amerika-aka-ei is Near Threatened.

Taxonomic Classification

Rank	Ardilla Gris Oriental	Amerika-aka-ei
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Elasmobranchii
Order	Rodentia (ネズミ目)	Myliobatiformes (トビエイ目)
Family	Sciuridae (Squirrels)	Dasyatidae
Genus	Sciurus (Tree Squirrels)	Hypanus
Species	Sciurus carolinensis	Hypanus americanus

Evolutionary Relationship

Ardilla Gris Oriental and Amerika-aka-ei share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Ardilla Gris Oriental

NE — Not Evaluated

Trend: Stable →

Amerika-aka-ei

NT — Near Threatened

Physical Characteristics

Attribute	Ardilla Gris Oriental	Amerika-aka-ei
Diet	Omnivore	—
Average Lifespan	6 years	—
Average Length	25 cm	—
Average Weight	500 g	—

Habitat & Geographic Range

Ardilla Gris Oriental

Habitat

Typically found in a wide range of habitat types.

Range

Widely distributed across Africa (South Africa), Asia (Indonesia), Europe (10 countries), and North America (Mexico, United States).

Amerika-aka-ei

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Ardilla Gris Oriental

ヒガシハイリス（Sciurus carolinensis）は北米東部原産の中型樹上性げっ歯類で、ヨーロッパをはじめ世界各地に移入された外来種である。IUCNレッドリストでは軽度懸念（LC）に分類されており、都市公園や郊外の森林環境への適応力が高く、堅果の埋蔵行動が植物の種子散布に重要な役割を果たしている。英国ではニホンリスを食物競争で駆逐しており、侵略的外来種としても問題視されている。