small tortoiseshell vs squirrel’s tail hydroid

Aglais urticae compared with Sertularia argentea

Key Differences

• small tortoiseshell is Near Threatened while squirrel’s tail hydroid is Not Evaluated.

Taxonomic Classification

Rank	small tortoiseshell	squirrel’s tail hydroid
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Cnidaria (Cnidarians)
Class	Insecta (Insects)	Hydrozoa (Hydrozoa)
Order	Lepidoptera (Butterflies & Moths)	Leptothecata (Leptothecata)
Family	Nymphalidae (Brush-footed Butterflies)	Sertulariidae
Genus	Aglais	Sertularia
Species	Aglais urticae	Sertularia argentea

Evolutionary Relationship

small tortoiseshell and squirrel’s tail hydroid share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

small tortoiseshell

NT — Near Threatened

squirrel’s tail hydroid

NE — Not Evaluated

Physical Characteristics

Attribute	small tortoiseshell	squirrel’s tail hydroid
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.

squirrel’s tail hydroid

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

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 2 countries:

🇳🇴 Norway 🇸🇪 Sweden