Oak Mildew vs small tortoiseshell

Erysiphe alphitoides compared with Aglais urticae

Key Differences

• Oak Mildew is Not Evaluated while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Oak Mildew	small tortoiseshell
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Arthropoda (Arthropods)
Class	Leotiomycetes (Leotiomycetes)	Insecta (Insects)
Order	Helotiales (Helotiales)	Lepidoptera (Butterflies & Moths)
Family	Erysiphaceae	Nymphalidae (Brush-footed Butterflies)
Genus	Erysiphe	Aglais
Species	Erysiphe alphitoides	Aglais urticae

Conservation Status

Oak Mildew

NE — Not Evaluated

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Oak Mildew	small tortoiseshell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Oak Mildew

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Found across Europe (6 countries) and North America (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.

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 6 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇵🇱 Poland 🇸🇮 Slovenia 🇸🇪 Sweden