In Croatia, unexploded mines dot the landscape and still kill people who find them. But a new animal is being trained to locate them for us: honeybees.
Nikola Kezic, an expert on the behavior of honeybees, sat quietly together with a group of young researchers on a recent day in a large net tent filled with the buzzing insects on a grass field lined with acacia trees. The professor at Zagreb University outlined the idea for the experiment: Bees have a perfect sense of smell that can quickly detect the scent of the explosives. They are being trained to identify their food with the scent of TNT.
“Our basic conclusion is that the bees can clearly detect this target, and we are very satisfied,” said Kezic, who leads a part of a larger multimillion-euro program, called “Tiramisu,” sponsored by the EU to detect land mines on the continent.
Several feeding points were set up on the ground around the tent, but only a few have TNT particles in them. The method of training the bees by authenticating the scent of explosives with the food they eat appears to work: bees gather mainly at the pots containing a sugar solution mixed with TNT, and not the ones that have a different smell.
It may be quite some time before the experiment reaches actual land mines. Training a few bees is completely different from training an entire colony. Link