First recorded

In a location that you monitor regularly (at least once a week), record the first time you see a live, active holly blue outdoors.

Overwinters as pupae and are first seen on the wing in April to May.

There are two broods, however in the north there only may be one. We record the first sightings of the first generation of adults, not the later appearances of the second generation. The second generation emerges from late July to early August.

Available historic data: we have good records from 1940-1945 and 1977-1999