Hylephila phyleus

The fiery skipper (Hylephila phyleus) is a species of butterfly in the family Hesperiidae. Reaching approximately 1 inch (2.5 cm) in length, male fiery skippers are orange or yellow while the females are dark brown. Small brown spots may be observed on both the hindwing and forewing of both sexes although to a varying degree. Females may be darker brown overall with pale checkered markings on the hindwing. Fiery skipper larvae, or caterpillars, are greenish pink-grey with a black head and constricted neck. These larvae are often considered pests and can feed on Bermudagrass, creeping bentgrass, and St. Augustine grass. Phylogenetic and genetic analysis of the fiery skipper revealed three haplotypes (HphH1, HphH26, and HphH31) to be shared in roughly 64.1% of all sampled individuals. Due to this high percentage, these haplotypes likely serve as central haplotypes from which different variations via mutations occurred. Haplotypes HphH22 and HphH23 were found in addition to HphH1, HphH26, and HphH31 to occur in species across all continents with certain haplotypes being prominent in different regions. More variation in haplotype may be observed in South America, suggesting populations may be larger and contain more diversity when compared to those of North America.

from Wikipedia