Kleiner Abendsegler vs Rusty Birch Button

Nyctalus leisleri compared with Acleris notana

Key Differences

• Kleiner Abendsegler is Endangered while Rusty Birch Button is Least Concern.

Taxonomic Classification

Rank	Kleiner Abendsegler	Rusty Birch Button
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Chordata (Chordatiere)	Arthropoda (Gliederfüßer)
Class	Mammalia (Säugetiere)	Insecta (Insekten)
Order	Chiroptera (Fledertiere)	Lepidoptera (Schmetterlinge)
Family	Vespertilionidae	Tortricidae
Genus	Nyctalus	Acleris
Species	Nyctalus leisleri	Acleris notana

Evolutionary Relationship

Kleiner Abendsegler and Rusty Birch Button share a common ancestor at the Kingdom level: Animalia. (Tier)

Conservation Status

Kleiner Abendsegler

EN — Endangered

Rusty Birch Button

LC — Least Concern

Physical Characteristics

Attribute	Kleiner Abendsegler	Rusty Birch Button
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Kleiner Abendsegler

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, Denmark, Luxembourg, Sweden, and Ukraine. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Rusty Birch Button

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Shared Countries

Both species can be found in 3 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇸🇪 Sweden