vs Four-toed Hedgehog

Bacidia rosella compared with Atelerix albiventris

Key Differences

• is Critically Endangered while Four-toed Hedgehog is Least Concern.

Taxonomic Classification

Rank		Four-toed Hedgehog
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Chordata (Chordates)
Class	Lecanoromycetes (Lecanoromycetes)	Mammalia (Mammals)
Order	Lecanorales (Lecanorales)	Erinaceomorpha (Erinaceomorpha)
Family	Ramalinaceae	Erinaceidae
Genus	Bacidia	Atelerix
Species	Bacidia rosella	Atelerix albiventris

Conservation Status

CR — Critically Endangered

Four-toed Hedgehog

LC — Least Concern

Physical Characteristics

Attribute		Four-toed Hedgehog
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 5 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

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.

Four-toed Hedgehog

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Ecuador and Spain.

Bacidia rosella is a crustose lichen in the family Ramalinaceae, assessed as Critically Endangered (CR). It grows on the smooth bark of ancient trees in old-growth woodland habitats with long ecological continuity. Its critically endangered status reflects extreme rarity and the near-total loss of suitable veteran tree habitats across its range.