False widow vs Harmless Serotine

Steatoda bipunctata compared with Eptesicus innoxius

Key Differences

• False widow is Least Concern while Harmless Serotine is Near Threatened.

Taxonomic Classification

Rank	False widow	Harmless Serotine
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Arachnida (Arachnids)	Mammalia (Mammals)
Order	Araneae (Araneae)	Chiroptera (Bats)
Family	Theridiidae	Vespertilionidae
Genus	Steatoda	Eptesicus
Species	Steatoda bipunctata	Eptesicus innoxius

Evolutionary Relationship

False widow and Harmless Serotine share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

False widow

LC — Least Concern

Harmless Serotine

NT — Near Threatened

Physical Characteristics

Attribute	False widow	Harmless Serotine
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

False widow

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Found across Europe (4 countries) and North America (Canada, United States).

Harmless Serotine

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.