Experienced bumblebees do not share their pollinating knowledge with less qualified bees, a new study has found. "Like other pollinators, bees face complex routing challenges when collecting nectar and pollen - they have to learn how to link patches of flowers together in the most efficient way, to minimise their travel distance and flight costs, just like in a travelling salesman problem," said Mathieu Lihoreau from Queen Mary University of London (QMUL)..