Northern Pearly-eye

Lethe anthedon

Lethe anthedon, the northern pearly-eye, is a species of butterfly in the subfamily Satyrinae of the family Nymphalidae. It is found in North America, from central Saskatchewan and eastern Nebraska east to Nova Scotia, south to central Alabama and Mississippi. Source

Where it is now

In the last 8 weeks this insect was recorded 22 times across 3 areas (each area is a 5 degree square).

See the Northern Pearly-eye on the live map

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.

Download every area as CSV

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