Oak Hook-tip

Watsonalla binaria

The oak hook-tip is a moth of the family Drepanidae. It is found in most of Europe except the far north. It is quite common in England and Wales, but not found in Scotland and only recently in Ireland. The species was first described by Johann Siegfried Hufnagel in 1767. Source

Where it is now

In the last 8 weeks this insect was recorded 303 times across 9 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 Europe ranged from 47°N in July to 58°N in September, about 1,200 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.