small tortoiseshell vs smooth giant clam

Aglais urticae compared with Tridacna derasa

Key Differences

• small tortoiseshell is Near Threatened while smooth giant clam is Vulnerable.

Taxonomic Classification

Rank	small tortoiseshell	smooth giant clam
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Lepidoptera (Butterflies & Moths)	Cardiida (Cardiida)
Family	Nymphalidae (Brush-footed Butterflies)	Cardiidae
Genus	Aglais	Tridacna
Species	Aglais urticae	Tridacna derasa

Evolutionary Relationship

small tortoiseshell and smooth giant clam share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

small tortoiseshell

NT — Near Threatened

smooth giant clam

VU — Vulnerable

Physical Characteristics

Attribute	small tortoiseshell	smooth giant clam
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.

smooth giant clam

Habitat

Inhabits tropical and subtropical moist broadleaf forests within the Oceanian biogeographic realm.

Range

Distributed across Marshall Islands and Taiwan. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.