Brown Diving Beetle vs Small Adder's-Tongue

Agabus brunneus compared with Ophioglossum azoricum

Key Differences

• Brown Diving Beetle is Extinct while Small Adder's-Tongue is Critically Endangered.

Taxonomic Classification

Rank	Brown Diving Beetle	Small Adder's-Tongue
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Arthropoda (Arthropods)	Tracheophyta
Class	Insecta (Insects)	Polypodiopsida (Polypodiopsida)
Order	Coleoptera (Beetles)	Ophioglossales (Ophioglossales)
Family	Dytiscidae	Ophioglossaceae
Genus	Agabus	Ophioglossum
Species	Agabus brunneus	Ophioglossum azoricum

Conservation Status

Brown Diving Beetle

EX — Extinct

Small Adder's-Tongue

CR — Critically Endangered

Physical Characteristics

Attribute	Brown Diving Beetle	Small Adder's-Tongue
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Diving Beetle

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium and Sweden.

Small Adder's-Tongue

Habitat

Inhabits boreal forests and taiga within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Brown Diving Beetle

The Brown Diving Beetle (Agabus brunneus) is a species in the genus Agabus. It is currently classified as Extinct on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

Shared Countries

Both species can be found in 2 countries:

🇧🇪 Belgium 🇸🇪 Sweden