Lesser Siren vs Noctule

Siren intermedia compared with Nyctalus noctula

Key Differences

• Lesser Siren is Least Concern while Noctule is Vulnerable.

Taxonomic Classification

Rank	Lesser Siren	Noctule
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Amphibia (Amphibians)	Mammalia (Mammals)
Order	Caudata (Caudata)	Chiroptera (Bats)
Family	Sirenidae	Vespertilionidae
Genus	Siren	Nyctalus
Species	Siren intermedia	Nyctalus noctula

Evolutionary Relationship

Lesser Siren and Noctule share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Lesser Siren

LC — Least Concern

Noctule

VU — Vulnerable

Physical Characteristics

Attribute	Lesser Siren	Noctule
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Lesser Siren

Habitat

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

Range

Distributed across Belgium and Mexico.

Noctule

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

Noctule

Noctule (Nyctalus noctula) is classified as Vulnerable (VU) on the IUCN Red List. Facing a high risk of endangerment in the wild, with declining populations and increasing habitat pressure.

Shared Countries

Both species can be found in 1 countries:

🇧🇪 Belgium