Ardilla Gris Oriental vs Black-thighed Puffleg

Sciurus carolinensis compared with Eriocnemis derbyi

Key Differences

• Ardilla Gris Oriental is Not Evaluated while Black-thighed Puffleg is Near Threatened.

Taxonomic Classification

Rank	Ardilla Gris Oriental	Black-thighed Puffleg
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Apodiformes (Apodiformes)
Family	Sciuridae (Squirrels)	Trochilidae
Genus	Sciurus (Tree Squirrels)	Eriocnemis
Species	Sciurus carolinensis	Eriocnemis derbyi

Evolutionary Relationship

Ardilla Gris Oriental and Black-thighed Puffleg share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Ardilla Gris Oriental

NE — Not Evaluated

Trend: Stable →

Black-thighed Puffleg

NT — Near Threatened

Physical Characteristics

Attribute	Ardilla Gris Oriental	Black-thighed Puffleg
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).

Black-thighed Puffleg

Habitat

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

Range

Distributed across Colombia, Ecuador, and Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Black-thighed Puffleg

An Andean puffleg hummingbird named for the males' distinctive velvety black thighs contrasting with the characteristic white leg feather puffs, black-thighed pufflegs inhabit humid montane forest and forest edges in Ecuador and Colombia at elevations of 1,500–3,500 meters. Males display glittering green plumage with a violet-blue tail. Listed as Near Threatened due to deforestation of the Andean cloud forest, with populations declining as the specialized high-altitude forest habitat is cleared for agriculture.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway