Spotted Beet Webworm

Hymenia perspectalis

Hymenia perspectalis, the spotted beet webworm moth, is a species of moth of the family Crambidae. It is found in various parts of the world, including North America, where it is found from Maine to Florida, west to Texas and north to Michigan and Ontario. It is also found in Belize, Hong Kong, Jamaica, Australia (Queensland), the Comoros, Equatorial Guinea, Réunion and South Africa. The species was described by Jacob Hübner in 1796. Source

Where it is now

In the last 8 weeks this insect was recorded 59 times across 7 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 27°N in November to 38°N in August, about 1,100 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.