First recorded

In a location that you monitor regularly (at least once a week), record the first time you see a live, active green-veined white outdoors.

Overwinters as pupae and first seen on the wing in late March to May.

There are two broods, however at higher altitudes there may be only one. We record the first sightings of the first generation of adults, not the later appearances of the second generation. The second generation emerges in July.

Available historic data: we have some records from 1972-1999