Red-spotted Admiral

Limenitis arthemis

Limenitis arthemis, the red-spotted purple or white admiral, is a North American butterfly species in the cosmopolitan genus Limenitis. It has been studied for its evolution of mimicry, and for the several stable hybrid wing patterns within this nominal species; it is one of the most dramatic examples of hybridization between non-mimetic and mimetic populations. Source

Where it is now

In the last 8 weeks this insect was recorded 57 times across 5 areas (each area is a 5 degree square).

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Movement and weather

Over the weeks it was present in the past year, its centre in North America ranged from 38°N in July to 47°N in August, about 1,000 km apart.

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.