Annual Willowherb vs Common Least Skipper

Epilobium brachycarpum compared with Ancyloxypha numitor

Key Differences

• Annual Willowherb is Not Evaluated while Common Least Skipper is Least Concern.

Taxonomic Classification

Rank	Annual Willowherb	Common Least Skipper
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Arthropoda (Arthropods)
Class	Magnoliopsida (Dicots)	Insecta (Insects)
Order	Myrtales (Myrtales)	Lepidoptera (Butterflies & Moths)
Family	Onagraceae	Hesperiidae
Genus	Epilobium	Ancyloxypha
Species	Epilobium brachycarpum	Ancyloxypha numitor

Conservation Status

Annual Willowherb

NE — Not Evaluated

Common Least Skipper

LC — Least Concern

Physical Characteristics

Attribute	Annual Willowherb	Common Least Skipper
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Annual Willowherb

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Europe (8 countries), North America (Canada, United States), and South America (Argentina, Chile).

Common Least Skipper

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States.

Annual Willowherb

The Annual Willowherb (Epilobium brachycarpum) is a species in the genus Epilobium. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

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.

Shared Countries

Both species can be found in 2 countries:

🇨🇦 Canada 🇺🇸 United States