Ready, set, fly! The ball bearings glued to this bumblebee's legs simulate the weight and placement of pollen loads. The tag on the insect's back is a lightweight sensor, designed to track its movements in flight.
Courtesy of Andrew Mountcastle
The decline of honeybees has been attributed to a variety of causes, from nasty parasites to the stress of being transported from state to state to feed on various crops in need of pollination.