Lesser Noctule vs Ruby-Crowned Kinglet

Nyctalus leisleri compared with Regulus calendula

Key Differences

• Lesser Noctule is Endangered while Ruby-Crowned Kinglet is Least Concern.

Taxonomic Classification

Rank	Lesser Noctule	Ruby-Crowned Kinglet
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Chiroptera (Bats)	Passeriformes (Songbirds)
Family	Vespertilionidae	Regulidae
Genus	Nyctalus	Regulus
Species	Nyctalus leisleri	Regulus calendula

Evolutionary Relationship

Lesser Noctule and Ruby-Crowned Kinglet share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Lesser Noctule

EN — Endangered

Ruby-Crowned Kinglet

LC — Least Concern

Physical Characteristics

Attribute	Lesser Noctule	Ruby-Crowned Kinglet
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Lesser Noctule

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.

Ruby-Crowned Kinglet

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Norway and United States.