Killing Bees (2005)

Killing Bees: When a group of Japanese students goes on a school field trip, they have no idea that their academic venture is about to turn into a horrific nightmare: They run into an angry swarm of mutant killer bees determined to eliminate them all. With unexpected intelligence and a lethal sting that causes human bodies to explode, the winged murderers begin to kill the kids one by one in this action-packed sci-fi adventure.