Brown Diving Beetle vs Cobblestone Tiger Beetle

Agabus brunneus compared with Cicindela marginipennis

Key Differences

• Brown Diving Beetle is Extinct while Cobblestone Tiger Beetle is Vulnerable.

Taxonomic Classification

Rank	Brown Diving Beetle	Cobblestone Tiger Beetle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class same	Insecta (Insects)	Insecta (Insects)
Order same	Coleoptera (Beetles)	Coleoptera (Beetles)
Family	Dytiscidae	Carabidae
Genus	Agabus	Cicindela
Species	Agabus brunneus	Cicindela marginipennis

Evolutionary Relationship

Brown Diving Beetle and Cobblestone Tiger Beetle share a common ancestor at the Order level: Coleoptera. (Beetles)

Conservation Status

Brown Diving Beetle

EX — Extinct

Cobblestone Tiger Beetle

VU — Vulnerable

Physical Characteristics

Attribute	Brown Diving Beetle	Cobblestone Tiger Beetle
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.

Cobblestone Tiger Beetle

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States. Currently classified as Vulnerable 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.

Cobblestone Tiger Beetle

Cobblestone tiger beetle (Cicindela marginipennis) is a medium-sized ground beetle in the family Carabidae (tribe Cicindelini), native to riverbars and cobblestone beaches of major river systems in eastern North America, from Quebec and Ontario south through the Ohio and Mississippi river basins. It is a habitat specialist restricted to dynamic, open gravel and cobble bars on large rivers, where bare, sun-warmed substrate provides ideal conditions for hunting small invertebrate prey. Like all tiger beetles, it is a fast-running, visually acute predator that captures prey by rapid pursuit. Adults are active on sunny days from late spring through summer, capable of short bursts of flight. Cobblestone tiger beetle is assessed as Vulnerable by the IUCN due to severe declines caused by the loss of dynamic river cobblestone habitat through dam construction, channelisation, bank stabilisation, and loss of natural flood regimes that maintain bare substrate. Populations have disappeared from many historically occupied rivers. Conservation efforts focus on preserving and restoring natural river dynamics on rivers where the species persists.