Braun’s Dwarf Frog vs Laysan Duck

Physalaemus lisei compared with Anas laysanensis

Key Differences

• Braun’s Dwarf Frog is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Braun’s Dwarf Frog	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	Leptodactylidae	Anatidae
Genus	Physalaemus	Anas
Species	Physalaemus lisei	Anas laysanensis

Evolutionary Relationship

Braun’s Dwarf Frog and Laysan Duck share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Braun’s Dwarf Frog

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Braun’s Dwarf Frog	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Braun’s Dwarf Frog

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.

Braun’s Dwarf Frog

The Braun’s Dwarf Frog (Physalaemus lisei) is a species in the genus Physalaemus. 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.