Bastard-Toadflax Rust vs Common Least Skipper

Puccinia thesii compared with Ancyloxypha numitor

Key Differences

• Bastard-Toadflax Rust is Not Evaluated while Common Least Skipper is Least Concern.

Taxonomic Classification

Rank	Bastard-Toadflax Rust	Common Least Skipper
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Arthropoda (Arthropods)
Class	Pucciniomycetes (Pucciniomycetes)	Insecta (Insects)
Order	Pucciniales (Pucciniales)	Lepidoptera (Butterflies & Moths)
Family	Pucciniaceae	Hesperiidae
Genus	Puccinia	Ancyloxypha
Species	Puccinia thesii	Ancyloxypha numitor

Conservation Status

Bastard-Toadflax Rust

NE — Not Evaluated

Common Least Skipper

LC — Least Concern

Physical Characteristics

Attribute	Bastard-Toadflax Rust	Common Least Skipper
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bastard-Toadflax Rust

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Norway, and Portugal.

Common Least Skipper

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Canada and United States.

Bastard-Toadflax Rust

The Bastard-Toadflax Rust (Puccinia thesii) is a species in the genus Puccinia. Native to Europe, inhabiting ecosystems characteristic of the region. Its range includes Belgium, Norway, and Portugal. Its conservation status has not been formally evaluated by the IUCN.

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.