Brown Diving Beetle vs Common Lazy Toad

Agabus brunneus compared with Oreolalax major

Key Differences

• Brown Diving Beetle is Extinct while Common Lazy Toad is Least Concern.

Taxonomic Classification

Rank	Brown Diving Beetle	Common Lazy Toad
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (artrópodos)	Chordata (cordados)
Class	Insecta (insecto)	Amphibia (Amphibians)
Order	Coleoptera (coleópteros)	Anura (Frogs & Toads)
Family	Dytiscidae	Megophryidae
Genus	Agabus	Oreolalax
Species	Agabus brunneus	Oreolalax major

Evolutionary Relationship

Brown Diving Beetle and Common Lazy Toad share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brown Diving Beetle

EX — Extinct

Common Lazy Toad

LC — Least Concern

Physical Characteristics

Attribute	Brown Diving Beetle	Common Lazy Toad
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 Lazy Toad

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

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 Lazy Toad

The Common Lazy Toad (<em>Oreolalax major</em>) is an amphibian in the family Megophryidae, classified as Least Concern on the IUCN Red List. The species typically inhabits freshwater habitats, moist forests, and wetlands, favoring cool, humid environments associated with mountain streams and adjacent riparian vegetation. As a member of the family Megophryidae, it is adapted to fast-flowing, clear mountain streams where larvae typically develop among leaf litter and gravel on the stream bed. The Common Lazy Toad is generally associated with the highland and montane zones of its range, relying on intact forest cover and unpolluted water bodies for reproduction and larval development. Its Least Concern status reflects an assessment of stable population trends, though like many amphibians it may be sensitive to changes in water quality, habitat loss, and emerging infectious diseases such as chytridiomycosis. Biological traits of this species remain poorly documented in the scientific literature.