Crested Shelduck vs small tortoiseshell

Tadorna cristata compared with Aglais urticae

Key Differences

• Crested Shelduck is Critically Endangered while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Crested Shelduck	small tortoiseshell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Aves (Birds)	Insecta (Insects)
Order	Anseriformes (Anseriformes)	Lepidoptera (Butterflies & Moths)
Family	Anatidae	Nymphalidae (Brush-footed Butterflies)
Genus	Tadorna	Aglais
Species	Tadorna cristata	Aglais urticae

Evolutionary Relationship

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

Conservation Status

Crested Shelduck

CR — Critically Endangered

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Crested Shelduck	small tortoiseshell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Crested Shelduck

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found in Norway. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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.

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 1 countries:

🇳🇴 Norway