small tortoiseshell vs tree slug

Aglais urticae compared with Lehmannia marginata

Key Differences

• small tortoiseshell is Near Threatened while tree slug is Least Concern.

Taxonomic Classification

Rank	small tortoiseshell	tree slug
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Gastropoda (Gastropoda)
Order	Lepidoptera (Butterflies & Moths)	Stylommatophora (Stylommatophora)
Family	Nymphalidae (Brush-footed Butterflies)	Limacidae
Genus	Aglais	Lehmannia
Species	Aglais urticae	Lehmannia marginata

Evolutionary Relationship

small tortoiseshell and tree slug share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

small tortoiseshell

NT — Near Threatened

tree slug

LC — Least Concern

Physical Characteristics

Attribute	small tortoiseshell	tree slug
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic 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.

tree slug

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Widely distributed across Europe (6 countries), North America (Dominican Republic), and South America (Chile).

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 🇫🇷 France 🇮🇹 Italy 🇳🇴 Norway 🇸🇪 Sweden