Arizona Gray Squirrel vs Black-thighed Puffleg

Sciurus arizonensis compared with Eriocnemis derbyi

Key Differences

• Arizona Gray Squirrel is Data Deficient while Black-thighed Puffleg is Near Threatened.

Taxonomic Classification

Rank	Arizona Gray Squirrel	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 arizonensis	Eriocnemis derbyi

Evolutionary Relationship

Arizona Gray Squirrel and Black-thighed Puffleg share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Arizona Gray Squirrel

DD — Data Deficient

Black-thighed Puffleg

NT — Near Threatened

Physical Characteristics

Attribute	Arizona Gray Squirrel	Black-thighed Puffleg
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Arizona Gray Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.

Arizona Gray Squirrel

The Arizona Gray Squirrel, Sciurus arizonensis, is a species. Its conservation status is listed as Data Deficient, meaning insufficient information exists to assess its risk of extinction. Typically found in diverse terrestrial and aquatic ecosystems.

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.