Bearberry Redstem vs Common Least Skipper

Exobasidium uvae-ursi compared with Ancyloxypha numitor

Taxonomic Classification

Rank	Bearberry Redstem	Common Least Skipper
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Arthropoda (Arthropods)
Class	Exobasidiomycetes (Exobasidiomycetes)	Insecta (Insects)
Order	Exobasidiales (Exobasidiales)	Lepidoptera (Butterflies & Moths)
Family	Exobasidiaceae	Hesperiidae
Genus	Exobasidium	Ancyloxypha
Species	Exobasidium uvae-ursi	Ancyloxypha numitor

Conservation Status

Bearberry Redstem

LC — Least Concern

Common Least Skipper

LC — Least Concern

Physical Characteristics

Attribute	Bearberry Redstem	Common Least Skipper
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bearberry Redstem

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Common Least Skipper

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States.

Bearberry Redstem

The Bearberry Redstem (Exobasidium uvae-ursi) is a species in the genus Exobasidium. It is currently classified as Least Concern on the IUCN Red List. Native to 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.