Changeable Rock-moss vs Common Least Skipper

Andreaea mutabilis compared with Ancyloxypha numitor

Key Differences

• Changeable Rock-moss is Not Evaluated while Common Least Skipper is Least Concern.

Taxonomic Classification

Rank	Changeable Rock-moss	Common Least Skipper
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Bryophyta	Arthropoda (Arthropods)
Class	Andreaeopsida (Andreaeopsida)	Insecta (Insects)
Order	Andreaeales (Andreaeales)	Lepidoptera (Butterflies & Moths)
Family	Andreaeaceae	Hesperiidae
Genus	Andreaea	Ancyloxypha
Species	Andreaea mutabilis	Ancyloxypha numitor

Conservation Status

Changeable Rock-moss

NE — Not Evaluated

Common Least Skipper

LC — Least Concern

Physical Characteristics

Attribute	Changeable Rock-moss	Common Least Skipper
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Changeable Rock-moss

Habitat

Native to Asia and Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway, Sweden, and Taiwan.

Common Least Skipper

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States.

Changeable Rock-moss

The Changeable Rock-moss (Andreaea mutabilis) is a species in the genus Andreaea. Native to Asia and Europe, inhabiting ecosystems characteristic of the region.

Common Least Skipper

The Common Least Skipper (<em>Ancyloxypha numitor</em>) is a small butterfly in the family Hesperiidae, classified as Least Concern on the IUCN Red List. It is native to Canada and the United States, where it typically inhabits virtually all terrestrial and freshwater habitats within its range, showing a particular affinity for moist, grassy areas near water. The species is among the smallest skippers in North America, characterized by orange and brown wing coloration and a rapid, low-flying flight pattern close to vegetation. Adults typically nectar on small flowers while larvae feed on grasses, particularly those in wet meadows, marshes, stream margins, and disturbed grassy areas. The Common Least Skipper is frequently observed in wetland margins, wet prairies, and roadsides with rank grass growth. Its wide distribution across North America and habitat generalism across moist grassland and wetland types support its stable population and Least Concern conservation status. Biological traits of this species remain poorly documented in the scientific literature.