Brown Diving Beetle vs Chinese Crested Tern

Agabus brunneus compared with Thalasseus bernsteini

Key Differences

• Brown Diving Beetle is Extinct while Chinese Crested Tern is Critically Endangered.

Taxonomic Classification

Rank	Brown Diving Beetle	Chinese Crested Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Aves (Birds)
Order	Coleoptera (Beetles)	Charadriiformes (Charadriiformes)
Family	Dytiscidae	Laridae
Genus	Agabus	Thalasseus
Species	Agabus brunneus	Thalasseus bernsteini

Evolutionary Relationship

Brown Diving Beetle and Chinese Crested Tern share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brown Diving Beetle

EX — Extinct

Chinese Crested Tern

CR — Critically Endangered

Physical Characteristics

Attribute	Brown Diving Beetle	Chinese Crested Tern
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.

Chinese Crested Tern

Habitat

Inhabits tropical and subtropical moist broadleaf forests within the Indomalayan biogeographic realm.

Range

Distributed across Norway and Taiwan. 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.

Chinese Crested Tern

The Chinese Crested Tern (Thalasseus bernsteini) is a species in the genus Thalasseus. It is currently classified as Critically Endangered on the IUCN Red List. Inhabits tropical and subtropical moist broadleaf forests within the Indomalayan biogeographic realm.