chestnut worm vs Common Least Skipper

Lumbricus castaneus compared with Ancyloxypha numitor

Key Differences

• chestnut worm is Not Evaluated while Common Least Skipper is Least Concern.

Taxonomic Classification

Rank	chestnut worm	Common Least Skipper
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Annelida (Segmented Worms)	Arthropoda (Arthropods)
Class	Clitellata (Clitellata)	Insecta (Insects)
Order	Crassiclitellata (Crassiclitellata)	Lepidoptera (Butterflies & Moths)
Family	Lumbricidae	Hesperiidae
Genus	Lumbricus	Ancyloxypha
Species	Lumbricus castaneus	Ancyloxypha numitor

Evolutionary Relationship

chestnut worm and Common Least Skipper share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

chestnut worm

NE — Not Evaluated

Common Least Skipper

LC — Least Concern

Physical Characteristics

Attribute	chestnut worm	Common Least Skipper
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

chestnut worm

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Common Least Skipper

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States.

chestnut worm

The chestnut worm (Lumbricus castaneus) is a species in the genus Lumbricus. Native to Europe and North America, 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.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States