Diffuse knapweed vs European otter

Centaurea diffusa compared with Lutra lutra

Key Differences

Diffuse knapweed is Not Evaluated while European otter is Vulnerable.

Taxonomic Classification

Rank	Diffuse knapweed	European otter
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Asterales (Daisies & Sunflowers)	Carnivora (Carnivorans)
Family	Asteraceae (Daisy Family)	Mustelidae (Weasels & Otters)
Genus	Centaurea	Lutra (Otters)
Species	Centaurea diffusa	Lutra lutra

Conservation Status

Diffuse knapweed

NE — Not Evaluated

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Diffuse knapweed	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Diffuse knapweed

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Asia (6 countries), Europe (26 countries), North America (Canada, United States), and South America (Argentina).

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Sleek semi-aquatic mustelid found along clean rivers, streams, and coastlines across Europe and Asia. European otters can reach 1.3 meters in length and are highly skilled fish hunters, using sensitive whiskers to detect prey movements. Requiring unpolluted water with abundant fish, they are an indicator species for freshwater ecosystem health. Once nearly extinct in Western Europe from hunting and pollution, populations have recovered significantly following water quality improvements.