Canadian Otter vs Ray's Knotgrass

Lontra canadensis compared with Polygonum oxyspermum

Key Differences

• Canadian Otter is Least Concern while Ray's Knotgrass is Endangered.

Taxonomic Classification

Rank	Canadian Otter	Ray's Knotgrass
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Magnoliopsida (Dicots)
Order	Carnivora (Carnivorans)	Caryophyllales (Caryophyllales)
Family	Mustelidae (Weasels & Otters)	Polygonaceae
Genus	Lontra	Polygonum
Species	Lontra canadensis	Polygonum oxyspermum

Conservation Status

Canadian Otter

LC — Least Concern

Ray's Knotgrass

EN — Endangered

Physical Characteristics

Attribute	Canadian Otter	Ray's Knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Canadian Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in United States.

Ray's Knotgrass

Habitat

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

Range

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

Canadian Otter

The Canadian Otter (Lontra canadensis) is a species in the genus Lontra. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.