Bayer's emerald bottle fly vs European otter

Bellardia bayeri compared with Lutra lutra

Key Differences

• Bayer's emerald bottle fly is Not Evaluated while European otter is Vulnerable.

Taxonomic Classification

Rank	Bayer's emerald bottle fly	European otter
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Diptera (Diptera)	Carnivora (Carnivorans)
Family	Calliphoridae	Mustelidae (Weasels & Otters)
Genus	Bellardia	Lutra (Otters)
Species	Bellardia bayeri	Lutra lutra

Evolutionary Relationship

Bayer's emerald bottle fly and European otter share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Bayer's emerald bottle fly

NE — Not Evaluated

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Bayer's emerald bottle fly	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Bayer's emerald bottle fly

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Norway, Sweden, and United States.

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.

Bayer's emerald bottle fly

The Bayer's emerald bottle fly (Bellardia bayeri) is a species in the genus Bellardia. Typically found in virtually all terrestrial and freshwater habitats.

European otter

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.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden