チョコモズモドキ vs Olive-gray Thomasomys

Vireo masteri compared with Thomasomys cinereus

Key Differences

• チョコモズモドキ is Endangered while Olive-gray Thomasomys is Least Concern.

Taxonomic Classification

Rank	チョコモズモドキ	Olive-gray Thomasomys
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Aves (鳥類)	Mammalia (哺乳類)
Order	Passeriformes (スズメ目)	Rodentia (ネズミ目)
Family	Vireonidae	Cricetidae
Genus	Vireo	Thomasomys
Species	Vireo masteri	Thomasomys cinereus

Evolutionary Relationship

チョコモズモドキ and Olive-gray Thomasomys share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

チョコモズモドキ

EN — Endangered

Olive-gray Thomasomys

LC — Least Concern

Physical Characteristics

Attribute	チョコモズモドキ	Olive-gray Thomasomys
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

チョコモズモドキ

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Distributed across Colombia, Ecuador, and Norway. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Olive-gray Thomasomys

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

チョコモズモドキ

The Choco Vireo (Vireo masteri) is a small, poorly known passerine in the family Vireonidae, with a highly restricted range in the western Andes foothills on the Pacific slope of Colombia and possibly adjacent Ecuador. It was described scientifically only in 1997, reflecting the challenges of survey work in the remote, wet, and botanically complex terrain of the Colombian Chocó. The Choco Vireo is a small greenish-yellow vireo with a distinctive facial pattern including a pale supercilium and dark eye-stripe. Like other vireos, it forages methodically through mid-canopy and sub-canopy foliage, gleaning caterpillars, beetles, and other invertebrates from leaves. Its song is a series of high, slurred phrases repeated with characteristic vireonid persistence. The species appears restricted to humid montane and foothill forest at elevations roughly between 800 and 1,800 metres — a zone severely impacted by the expansion of coca cultivation, illegal logging, and cattle ranching in the Colombian Pacific region. The IUCN classifies the Choco Vireo as Endangered given its extremely small and severely fragmented range and continued loss of suitable forest habitat. Very little is known about its population size, ecology, or breeding biology, making targeted survey and monitoring urgently needed.

Shared Countries

Both species can be found in 1 countries:

🇪🇨 Ecuador