Figure 3: Mapping of the nests of Halictus scabiosae at the study site. Left: strip of 5×24 m (see Figure 2) with the four batches of nests (A–D, marked by yellow areas) where the activities of Halictus scabiosae and their parasites were videotaped. The grid indicates 2m×2m. Right: batches of active nests; the insets show the batches on a smaller scale with the nest entrances shown as black full circles.