Common Least Skipper vs Pool Frog

Ancyloxypha numitor compared with Pelophylax lessonae

Key Differences

• Common Least Skipper is Least Concern while Pool Frog is Critically Endangered.

Taxonomic Classification

Rank	Common Least Skipper	Pool Frog
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Arthropoda (節足動物)	Chordata (脊索動物)
Class	Insecta (昆虫)	Amphibia (両生類)
Order	Lepidoptera (チョウ目)	Anura (カエル)
Family	Hesperiidae	Ranidae
Genus	Ancyloxypha	Pelophylax
Species	Ancyloxypha numitor	Pelophylax lessonae

Evolutionary Relationship

Common Least Skipper and Pool Frog share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Common Least Skipper

LC — Least Concern

Pool Frog

CR — Critically Endangered

Physical Characteristics

Attribute	Common Least Skipper	Pool Frog
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Least Skipper

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States.

Pool Frog

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (8 countries). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Pool Frog

Pool Frog（Pelophylax lessonae）はIUCNレッドリストで絶滅危惧IA類（CR）に分類される。深刻な個体数の減少と生息地の損失により、野生での絶滅の危険性が極めて高い状態にある。