Crescent Map Lichen vs Laysan Duck

Rhizocarpon lecanorinum compared with Anas laysanensis

Key Differences

• Crescent Map Lichen is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Crescent Map Lichen	Laysan Duck
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Chordata (Chordates)
Class	Lecanoromycetes (Lecanoromycetes)	Aves (Birds)
Order	Rhizocarpales (Rhizocarpales)	Anseriformes (Anseriformes)
Family	Rhizocarpaceae	Anatidae
Genus	Rhizocarpon	Anas
Species	Rhizocarpon lecanorinum	Anas laysanensis

Conservation Status

Crescent Map Lichen

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Crescent Map Lichen	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Crescent Map Lichen

Habitat

Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Colombia, Denmark, Norway, Sweden, 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.

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway