Brown Slender Toad vs Laysan Duck

Ansonia leptopus compared with Anas laysanensis

Key Differences

• Brown Slender Toad is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Brown Slender 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	Bufonidae	Anatidae
Genus	Ansonia	Anas
Species	Ansonia leptopus	Anas laysanensis

Evolutionary Relationship

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

Conservation Status

Brown Slender Toad

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Brown Slender Toad	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Slender 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.

Brown Slender Toad

The Brown Slender Toad (Ansonia leptopus) is a species in the genus Ansonia. 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.