Bumblebee is a flying insect which form colonies with a single queen. There are from 50 to 400 individuals in one nest. It's small amount in comparison with honeybee hives which has about 50 000 bees. Bumblees beat their wings about 200 times a second. Bumblebees are important pollinators of crops and wildflowers. Bumblebee species are not aggressive, but may sting in defence of their hive.