Figure 4
From: Artificial shaking signals in honey bee colonies elicit natural responses

Magnetic shaker, composed of an activator on the outside of the hive and a vibrating wand on the inside to stimulate bees. (A) Design of the shaker. (B) Photo showing side view of the shaker when set up in a plexiglass arena with a bee. (C) Photo showing the magnetic shaker set up inside an observation hive.