Moss Oysterling vs small tortoiseshell

Arrhenia acerosa compared with Aglais urticae

Key Differences

Moss Oysterling is Least Concern while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Moss Oysterling	small tortoiseshell
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Arthropoda (Arthropods)
Class	Agaricomycetes (Mushrooms)	Insecta (Insects)
Order	Agaricales (Gilled Mushrooms)	Lepidoptera (Butterflies & Moths)
Family	Hygrophoraceae	Nymphalidae (Brush-footed Butterflies)
Genus	Arrhenia	Aglais
Species	Arrhenia acerosa	Aglais urticae

Conservation Status

Moss Oysterling

LC — Least Concern

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Moss Oysterling	small tortoiseshell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Moss Oysterling

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

small tortoiseshell

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (41 countries). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

small tortoiseshell (Aglais urticae) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.