Chuanbei Toothed Toad vs Common Lazy Toad

Oreolalax chuanbeiensis compared with Oreolalax major

Key Differences

• Chuanbei Toothed Toad is Endangered while Common Lazy Toad is Least Concern.

Taxonomic Classification

Rank	Chuanbei Toothed Toad	Common Lazy Toad
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class same	Amphibia (สัตว์สะเทินน้ำสะเทินบก)	Amphibia (สัตว์สะเทินน้ำสะเทินบก)
Order same	Anura (อันดับกบ)	Anura (อันดับกบ)
Family same	Megophryidae	Megophryidae
Genus same	Oreolalax	Oreolalax
Species	Oreolalax chuanbeiensis	Oreolalax major

Evolutionary Relationship

Chuanbei Toothed Toad and Common Lazy Toad share a common ancestor at the Genus level: Oreolalax.

Conservation Status

Chuanbei Toothed Toad

EN — Endangered

Common Lazy Toad

LC — Least Concern

Physical Characteristics

Attribute	Chuanbei Toothed Toad	Common Lazy Toad
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chuanbei Toothed Toad

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Common Lazy Toad

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Chuanbei Toothed Toad

The Chuanbei Toothed Toad (Oreolalax chuanbeiensis) is an Endangered amphibian endemic to the mountains of northern Sichuan Province in southwestern China. It belongs to the family Megophryidae, a diverse group of litter frogs and toad-like amphibians that is particularly species-rich in the eastern Himalayan and southwestern Chinese highlands. The species name chuanbeiensis refers to northern Sichuan (Chuanbei), reflecting its highly restricted geographic range. Like other Oreolalax species, the Chuanbei Toothed Toad is associated with cold, fast-flowing mountain streams, where larvae develop in torrent conditions that require specialized morphological adaptations including oral suckers. Adults are terrestrial outside the breeding season, sheltering in leaf litter and rocky crevices in montane forest. The IUCN has assessed this species as Endangered due to its small known range, ongoing habitat degradation from logging, agriculture, and infrastructure development in mountain areas, and the impacts of chytridiomycosis (amphibian chytrid fungal disease) which threatens Asian megophryid frogs. Limited survey data mean that the species' full extent of occurrence and population size are poorly constrained.

Common Lazy Toad

The Common Lazy Toad (<em>Oreolalax major</em>) is an amphibian in the family Megophryidae, classified as Least Concern on the IUCN Red List. The species typically inhabits freshwater habitats, moist forests, and wetlands, favoring cool, humid environments associated with mountain streams and adjacent riparian vegetation. As a member of the family Megophryidae, it is adapted to fast-flowing, clear mountain streams where larvae typically develop among leaf litter and gravel on the stream bed. The Common Lazy Toad is generally associated with the highland and montane zones of its range, relying on intact forest cover and unpolluted water bodies for reproduction and larval development. Its Least Concern status reflects an assessment of stable population trends, though like many amphibians it may be sensitive to changes in water quality, habitat loss, and emerging infectious diseases such as chytridiomycosis. Biological traits of this species remain poorly documented in the scientific literature.