most bumblebees live in small groups, which generally last only for a year (though the queen lasts longer). they collect pollen as protein for their young, and themselves eat nectar. they are extremely hairy, with a covering of soft hairs called a "pile". it is the female worker bee which one sees out collecting pollen. the pollen is packed into two "baskets" on its hind, very noticeable when full. the baskets are just hairs specially adapted for this function.