Eurasian Tree Sparrow vs Guayaquil Squirrel

Passer montanus compared with Sciurus stramineus

Key Differences

• Eurasian Tree Sparrow is Endangered while Guayaquil Squirrel is Least Concern.

Taxonomic Classification

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

Evolutionary Relationship

Eurasian Tree Sparrow and Guayaquil Squirrel share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Eurasian Tree Sparrow

EN — Endangered

Guayaquil Squirrel

LC — Least Concern

Physical Characteristics

Attribute	Eurasian Tree Sparrow	Guayaquil Squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Guayaquil Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Peru.

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.