Bitter Beech Bolete vs small tortoiseshell

Caloboletus calopus compared with Aglais urticae

Key Differences

• Bitter Beech Bolete is Least Concern while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Bitter Beech Bolete	small tortoiseshell
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Arthropoda (Arthropods)
Class	Agaricomycetes (Mushrooms)	Insecta (Insects)
Order	Boletales (Boletales)	Lepidoptera (Butterflies & Moths)
Family	Boletaceae	Nymphalidae (Brush-footed Butterflies)
Genus	Caloboletus	Aglais
Species	Caloboletus calopus	Aglais urticae

Conservation Status

Bitter Beech Bolete

LC — Least Concern

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Bitter Beech Bolete	small tortoiseshell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bitter Beech Bolete

Habitat

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

Range

Distributed across Denmark, Norway, Sweden, and United States.

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.

Bitter Beech Bolete

The Bitter Beech Bolete (Caloboletus calopus) is a species in the genus Caloboletus. It is currently classified as Least Concern on the IUCN Red List. Typically found in forest floors, decomposing wood, and soil ecosystems.

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 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden