Brown Diving Beetle vs Common Brassy Ringlet

Agabus brunneus compared with Erebia cassioides

Key Differences

• Brown Diving Beetle is Extinct while Common Brassy Ringlet is Least Concern.

Taxonomic Classification

Rank	Brown Diving Beetle	Common Brassy Ringlet
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class same	Insecta (Insects)	Insecta (Insects)
Order	Coleoptera (Beetles)	Lepidoptera (Butterflies & Moths)
Family	Dytiscidae	Nymphalidae (Brush-footed Butterflies)
Genus	Agabus	Erebia
Species	Agabus brunneus	Erebia cassioides

Evolutionary Relationship

Brown Diving Beetle and Common Brassy Ringlet share a common ancestor at the Class level: Insecta. (Insects)

Conservation Status

Brown Diving Beetle

EX — Extinct

Common Brassy Ringlet

LC — Least Concern

Physical Characteristics

Attribute	Brown Diving Beetle	Common Brassy Ringlet
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.

Common Brassy Ringlet

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Austria, Bosnia and Herzegovina, Bulgaria, and Italy.

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.

Common Brassy Ringlet

The common brassy ringlet (<em>Erebia cassioides</em>) is a butterfly species endemic to high-altitude mountain environments of central and southern Europe, with documented occurrences in Austria, Bosnia and Herzegovina, Bulgaria, and Italy. This species typically inhabits all terrestrial and freshwater environments within its alpine range, favoring subalpine and alpine grasslands at elevations often exceeding 1,500 meters. It is classified as Least Concern on the IUCN Red List, reflecting a currently stable population status. As a member of the family Nymphalidae, the common brassy ringlet often feeds on grasses and sedges during its larval stage, while adult butterflies are typically found nectaring on alpine flowers. The species is often associated with calcareous grasslands and rocky slopes, where it can be seen flying in warm, sunny conditions during the summer months. Biological traits of this species remain poorly documented in the scientific literature.