Fierce Orbweaver vs Miller’s Mastiff Bat

Araneus saevus compared with Molossus pretiosus

Key Differences

• Fierce Orbweaver is Near Threatened while Miller’s Mastiff Bat is Least Concern.

Taxonomic Classification

Rank	Fierce Orbweaver	Miller’s Mastiff Bat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Arachnida (Arachnids)	Mammalia (Mammals)
Order	Araneae (Araneae)	Chiroptera (Bats)
Family	Araneidae	Molossidae
Genus	Araneus	Molossus
Species	Araneus saevus	Molossus pretiosus

Evolutionary Relationship

Fierce Orbweaver and Miller’s Mastiff Bat share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Fierce Orbweaver

NT — Near Threatened

Miller’s Mastiff Bat

LC — Least Concern

Physical Characteristics

Attribute	Fierce Orbweaver	Miller’s Mastiff Bat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Fierce Orbweaver

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Distributed across Canada, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Miller’s Mastiff Bat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela.