Birch Polypore vs Laysan Duck

Fomitopsis betulina compared with Anas laysanensis

Key Differences

• Birch Polypore is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Birch Polypore	Laysan Duck
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Aves (Birds)
Order	Polyporales (Polyporales)	Anseriformes (Anseriformes)
Family	Fomitopsidaceae	Anatidae
Genus	Fomitopsis	Anas
Species	Fomitopsis betulina	Anas laysanensis

Conservation Status

Birch Polypore

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Birch Polypore	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Birch Polypore

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Denmark and United States.

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.

Birch Polypore

The Birch Polypore (Fomitopsis betulina) is a species in the genus Fomitopsis. It is currently classified as Least Concern on the IUCN Red List. Typically found in forest floors, decomposing wood, and soil ecosystems.

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.