i came across a july article about bomb sniffing bees in popular science magazine. the picture caught my eye....as it's ROWS and ROWS of bees strapped to a "switch looking" device. it says...."the handheld device is about the size of a dustbuster". the bees are trained to extend their proboscis to feed when they sense leaky explosive compounds. when their tongue breaks the infrared beam.....they set off the alarm.
the article is sure to state in the end that THE BEES ARE RETURNED TO THEIR HIVES after their shift.