False Bruce Spanworm vs Merriam’s Pocket Mouse

Macaria loricaria compared with Perognathus merriami

Key Differences

• False Bruce Spanworm is Near Threatened while Merriam’s Pocket Mouse is Least Concern.

Taxonomic Classification

Rank	False Bruce Spanworm	Merriam’s Pocket Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Lepidoptera (Butterflies & Moths)	Rodentia (Rodents)
Family	Geometridae	Heteromyidae
Genus	Macaria	Perognathus
Species	Macaria loricaria	Perognathus merriami

Evolutionary Relationship

False Bruce Spanworm and Merriam’s Pocket Mouse share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

False Bruce Spanworm

NT — Near Threatened

Merriam’s Pocket Mouse

LC — Least Concern

Physical Characteristics

Attribute	False Bruce Spanworm	Merriam’s Pocket Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

False Bruce Spanworm

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

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

Merriam’s Pocket Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.