Fig. 2. Anterior view of a two-frame observation
hive and insominator. The insominator,
consisting of two magnetic arrays flanking the
hive, a track, and a base supporting the track
and arrays directly contacts the suspended observation
hive at only one point on each side of
the hive. Arrows represent directional movement
of magnetic arrays on the anterior and
posterior sides of the hive. Dark areas on the
periphery of the hive represent passageways
between the anterior and posterior sides of the
hive. The magnets jostled treatment bees, but
not control bees. Magnet arrays remained to the
left or right of the hive between insominator
movements.
22706 | www.pnas.org/cgi/doi/10.1073/pnas.1009439108 Klein et al.