Ardilla Gris Oriental vs Western Gray Squirrel

Sciurus carolinensis compared with Sciurus griseus

Key Differences

• Ardilla Gris Oriental is Not Evaluated while Western Gray Squirrel is Least Concern.

Taxonomic Classification

Rank	Ardilla Gris Oriental	Western Gray Squirrel
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order same	Rodentia (ネズミ目)	Rodentia (ネズミ目)
Family same	Sciuridae (Squirrels)	Sciuridae (Squirrels)
Genus same	Sciurus (Tree Squirrels)	Sciurus (Tree Squirrels)
Species	Sciurus carolinensis	Sciurus griseus

Evolutionary Relationship

Ardilla Gris Oriental and Western Gray Squirrel share a common ancestor at the Genus level: Sciurus. (Tree Squirrels)

Conservation Status

Ardilla Gris Oriental

NE — Not Evaluated

Trend: Stable →

Western Gray Squirrel

LC — Least Concern

Physical Characteristics

Attribute	Ardilla Gris Oriental	Western Gray Squirrel
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).

Western Gray Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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。