Ardilla Gris Oriental vs Eurasian Tree Sparrow

Sciurus carolinensis compared with Passer montanus

Key Differences

• Ardilla Gris Oriental is Not Evaluated while Eurasian Tree Sparrow is Endangered.

Taxonomic Classification

Rank	Ardilla Gris Oriental	Eurasian Tree Sparrow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Passeriformes (Songbirds)
Family	Sciuridae (Squirrels)	Passeridae
Genus	Sciurus (Tree Squirrels)	Passer
Species	Sciurus carolinensis	Passer montanus

Evolutionary Relationship

Ardilla Gris Oriental and Eurasian Tree Sparrow share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Ardilla Gris Oriental

NE — Not Evaluated

Trend: Stable →

Eurasian Tree Sparrow

EN — Endangered

Physical Characteristics

Attribute	Ardilla Gris Oriental	Eurasian Tree Sparrow
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).

Eurasian Tree Sparrow

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 6 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Indonesia, Philippines, Singapore), Europe (7 countries), North America (Canada, United States), and Oceania and the Pacific (Australia, Marshall Islands). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Ardilla Gris Oriental

Native to eastern North America but successfully introduced to Europe and other regions, the eastern gray squirrel is a medium-sized arboreal rodent weighing up to 600 g. Highly adaptable, thriving in forests, parks, and urban gardens, gray squirrels cache thousands of nuts and seeds each autumn, inadvertently planting trees through forgotten caches. In Britain, they have largely displaced the native red squirrel by outcompeting them for food.

Eurasian Tree Sparrow

Eurasian Tree Sparrow (Passer montanus) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

Shared Countries

Both species can be found in 6 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇮🇩 Indonesia 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States