Bog Dwarf vs European otter

Elachista utonella compared with Lutra lutra

Key Differences

Bog Dwarf is Least Concern while European otter is Vulnerable.

Taxonomic Classification

Rank	Bog Dwarf	European otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Lepidoptera (Butterflies & Moths)	Carnivora (Carnivorans)
Family	Elachistidae	Mustelidae (Weasels & Otters)
Genus	Elachista	Lutra (Otters)
Species	Elachista utonella	Lutra lutra

Evolutionary Relationship

Bog Dwarf and European otter share a common ancestor at the Kingdom level: Animalia. (Animals)

View Kingdom: Animalia

Conservation Status

Bog Dwarf

LC — Least Concern

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Bog Dwarf

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.

Bog Dwarf

The Bog Dwarf (Elachista utonella) is a species in the genus Elachista. It is currently classified as Least Concern on the IUCN Red List. Distributed across Belgium, Denmark, Norway, and Sweden.

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.