Grounded Oysterling vs small tortoiseshell

Crepidotus autochthonus compared with Aglais urticae

Key Differences

• Grounded Oysterling is Vulnerable while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Grounded 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	Crepidotaceae	Nymphalidae (Brush-footed Butterflies)
Genus	Crepidotus	Aglais
Species	Crepidotus autochthonus	Aglais urticae

Conservation Status

Grounded Oysterling

VU — Vulnerable

small tortoiseshell

NT — Near Threatened

Physical Characteristics

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

Habitat & Geographic Range

Grounded Oysterling

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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

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.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden