Blue-flanked Treefrog vs European otter

Boana calcarata compared with Lutra lutra

Key Differences

• Blue-flanked Treefrog is Least Concern while European otter is Vulnerable.

Taxonomic Classification

Rank	Blue-flanked Treefrog	European otter
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class	Amphibia (земноводные)	Mammalia (млекопитающие)
Order	Anura (бесхвостые земноводные)	Carnivora (хищные)
Family	Hylidae	Mustelidae (Weasels & Otters)
Genus	Boana	Lutra (Otters)
Species	Boana calcarata	Lutra lutra

Evolutionary Relationship

Blue-flanked Treefrog and European otter share a common ancestor at the Phylum level: Chordata. (хордовые)

Conservation Status

Blue-flanked Treefrog

LC — Least Concern

European otter

VU — Vulnerable

Trend: Stable →

Physical Characteristics

Attribute	Blue-flanked Treefrog	European otter
Diet	—	Carnivore
Average Lifespan	—	10 years
Average Length	—	1.0 m
Average Weight	—	10.0 kg

Habitat & Geographic Range

Blue-flanked Treefrog

Habitat

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

Range

Found in Venezuela.

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Blue-flanked Treefrog

The Blue Flanked Treefrog (Boana calcarata) is a species in the genus Boana. It is currently classified as Least Concern on the IUCN Red List. Typically found in freshwater habitats, moist forests, and wetlands.

European otter

Sleek semi-aquatic mustelid found along clean rivers, streams, and coastlines across Europe and Asia. European otters can reach 1.3 meters in length and are highly skilled fish hunters, using sensitive whiskers to detect prey movements. Requiring unpolluted water with abundant fish, they are an indicator species for freshwater ecosystem health. Once nearly extinct in Western Europe from hunting and pollution, populations have recovered significantly following water quality improvements.