Bartail spurdog vs clouded magpie

Squalus notocaudatus compared with Abraxas sylvata

Key Differences

• Bartail spurdog is Least Concern while clouded magpie is Vulnerable.

Taxonomic Classification

Rank	Bartail spurdog	clouded magpie
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Elasmobranchii	Insecta (Insects)
Order	Squaliformes (Squaliformes)	Lepidoptera (Butterflies & Moths)
Family	Squalidae	Geometridae
Genus	Squalus	Abraxas
Species	Squalus notocaudatus	Abraxas sylvata

Evolutionary Relationship

Bartail spurdog and clouded magpie share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Bartail spurdog

LC — Least Concern

clouded magpie

VU — Vulnerable

Physical Characteristics

Attribute	Bartail spurdog	clouded magpie
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bartail spurdog

clouded magpie

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Bartail spurdog

The Bartail spurdog (Squalus notocaudatus) is a species in the genus Squalus. It is currently classified as Least Concern on the IUCN Red List.

clouded magpie

The clouded magpie (Abraxas sylvata) is a geometrid moth in the family Geometridae found across temperate Europe, extending eastward through Russia to Japan. The adult wingspan measures approximately 32–42 mm, with white wings bearing a distinctive pattern of yellow-orange and dark grey to black spots and patches arranged in rows across the forewing and hindwing, creating a striking patterned appearance resembling the magpie coloring of the related magpie moth Abraxas grossulariata, but with a more yellowish, muted tone and less black — hence 'clouded.' Adults fly in one generation from June to July, resting on leaf surfaces and attending woodland flowers for nectar. The larvae feed on wych elm (Ulmus glabra) and occasionally other Ulmus species in mature deciduous woodland and woodland edges. The clouded magpie has become less common in parts of its European range due to the widespread loss of mature elms from Dutch elm disease, which devastated European elm populations from the 1970s onward. Conservation of this species requires the protection of surviving mature elm trees and management of regrowth elms in woodland ecosystems.