Nerz vs Pixie Foam

Mustela lutreola compared with Stereocaulon pileatum

Key Differences

• Nerz is Extinct while Pixie Foam is Critically Endangered.

Taxonomic Classification

Rank	Nerz	Pixie Foam
Kingdom	Animalia (Tier)	Fungi (Pilze)
Phylum	Chordata (Chordatiere)	Ascomycota (Schlauchpilze)
Class	Mammalia (Säugetiere)	Lecanoromycetes (Lecanoromycetes)
Order	Carnivora (Raubtiere)	Lecanorales (Lecanorales)
Family	Mustelidae (Weasels & Otters)	Stereocaulaceae
Genus	Mustela	Stereocaulon
Species	Mustela lutreola	Stereocaulon pileatum

Conservation Status

Nerz

EX — Extinct

Pixie Foam

CR — Critically Endangered

Physical Characteristics

Attribute	Nerz	Pixie Foam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Nerz

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Europe (6 countries).

Pixie Foam

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, Sweden, and United States. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.