Robust Bracket vs small tortoiseshell

Fomitiporia robusta compared with Aglais urticae

Key Differences

• Robust Bracket is Endangered while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Robust Bracket	small tortoiseshell
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Arthropoda (Arthropods)
Class	Agaricomycetes (Mushrooms)	Insecta (Insects)
Order	Hymenochaetales (Hymenochaetales)	Lepidoptera (Butterflies & Moths)
Family	Hymenochaetaceae	Nymphalidae (Brush-footed Butterflies)
Genus	Fomitiporia	Aglais
Species	Fomitiporia robusta	Aglais urticae

Conservation Status

Robust Bracket

EN — Endangered

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Robust Bracket	small tortoiseshell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Robust Bracket

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Endangered 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