Brown Roll Rim vs Laysan Duck

Paxillus involutus compared with Anas laysanensis

Key Differences

Brown Roll Rim is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Brown Roll Rim	Laysan Duck
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Aves (Birds)
Order	Boletales (Boletales)	Anseriformes (Anseriformes)
Family	Paxillaceae	Anatidae
Genus	Paxillus	Anas
Species	Paxillus involutus	Anas laysanensis

Conservation Status

Brown Roll Rim

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Brown Roll Rim	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Roll Rim

Habitat

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

Range

Widely distributed across Europe (4 countries), North America (United States), and South America (Brazil, Chile).

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 Roll Rim

The Brown Roll Rim (Paxillus involutus) is a species in the genus Paxillus. 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.