Chaochiao Lazy Toad vs Laysan Duck

Oreolalax rugosus compared with Anas laysanensis

Key Differences

• Chaochiao Lazy Toad is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Chaochiao Lazy Toad	Laysan Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Amphibia (Amphibians)	Aves (Birds)
Order	Anura (Frogs & Toads)	Anseriformes (Anseriformes)
Family	Megophryidae	Anatidae
Genus	Oreolalax	Anas
Species	Oreolalax rugosus	Anas laysanensis

Evolutionary Relationship

Chaochiao Lazy Toad and Laysan Duck share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Chaochiao Lazy Toad

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Chaochiao Lazy Toad	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chaochiao Lazy Toad

Habitat

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

Laysan Duck

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Belgium, France, Netherlands, Norway, and United Kingdom. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Chaochiao Lazy Toad

The Chaochiao Lazy Toad (Oreolalax rugosus) is a species in the genus Oreolalax. It is currently classified as Least Concern on the IUCN Red List. Typically found in freshwater habitats, moist forests, and wetlands.

Laysan Duck

Laysan Duck (Anas laysanensis) is classified as Critically Endangered (CR) on the IUCN Red List. Facing an extremely high risk of extinction in the wild due to severe population decline and habitat loss.