Heart And Dart

Agrotis exclamationis

The heart and dart is a moth of the family Noctuidae. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. A familiar moth to many, it is considered one of the most common of the European region. It occurs throughout the Palearctic realm from Ireland to Japan. Source

Where it is now

In the last 8 weeks this insect was recorded 6 times across 2 areas (each area is a 5 degree square).

See the Heart And Dart on the live map

Movement and weather

Each season it is first heard regularly where daytime highs are around 16°C (typically 11 to 20°C, from 7 areas).

Over the weeks it was present in the past year, its centre in Europe ranged from 48°N in July to 56°N in June, 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.