Instead , they fly from one potential hibernation site to another , each time dropping off a load of S. vespae juveniles .
Parasitized queen hornets never dig or gather nesting materials when they land at different locations .
They fly from one potential hibernation site to another , each time dropping off a load of S. vespae juveniles .
Parasitized queen hornets never dig or gather nesting materials when they land at different locations .