Blacktail spurdog vs Common corncockle

Squalus melanurus compared with Agrostemma githago

Key Differences

• Blacktail spurdog is Data Deficient while Common corncockle is Critically Endangered.

Taxonomic Classification

Rank	Blacktail spurdog	Common corncockle
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Elasmobranchii	Magnoliopsida (Dicots)
Order	Squaliformes (Squaliformes)	Caryophyllales (Caryophyllales)
Family	Squalidae	Caryophyllaceae
Genus	Squalus	Agrostemma
Species	Squalus melanurus	Agrostemma githago

Conservation Status

Blacktail spurdog

DD — Data Deficient

Common corncockle

CR — Critically Endangered

Physical Characteristics

Attribute	Blacktail spurdog	Common corncockle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blacktail spurdog

Common corncockle

Habitat

Found across multiple habitat types including montane grasslands and shrublands, tropical and subtropical moist broadleaf forests, and temperate coniferous forests, among 13 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Lesotho), Asia (7 countries), Europe (24 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia), and South America (Brazil, Chile). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Blacktail spurdog

The Blacktail spurdog (Squalus melanurus) is a species in the genus Squalus. It is currently classified as Data Deficient on the IUCN Red List.

Common corncockle

<em>Agrostemma githago</em>, commonly known as common corncockle, is an annual flowering plant in the family Caryophyllaceae. Once a widespread weed of cereal crops across Europe, Asia, and beyond, this species is now Critically Endangered on the IUCN Red List due to the dramatic decline caused by modern agricultural practices, particularly improved grain cleaning and herbicide use. Corncockle is a tall, slender plant covered in silky white hairs, bearing large, solitary pink to purple flowers with distinctive dark veining. Its seeds contain toxic saponin compounds called githagins, which historically contaminated grain supplies. The species now survives primarily in wildflower conservation areas, seed banks, and traditional farmland conservation schemes. It typically grows in open, disturbed arable soils with full sun exposure. Biological traits of this species remain poorly documented in the scientific literature.