Horace's Duskywing

Erynnis horatius

Erynnis horatius, commonly known as Horace's duskywing, is a species of butterfly in the family Hesperiidae. It is found in the United States from Massachusetts to Florida, and west to eastern South Dakota, the Gulf Coast, south-eastern Utah, Colorado, north-eastern Arizona, and New Mexico. It is listed as a species of special concern in the US state of Connecticut. Source

Where it is now

In the last 8 weeks this insect was recorded 9 times across 3 areas (each area is a 5 degree square).

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Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.