You are certainly to be commended for your attempts at bee-rescue,WendyS... Bumblebee queens, beginning in spring have but one purpose and that is to lay about a dozen or fewer eggs in a beeswax ball she prepares. When the eggs hatch she continues to add wax and pollen to the ball so the larvae aren't able to eat their way out. Finally, she encloses the beeswax ball in a cocoon spun of silk from her body. There may be several of these balls in the nest, depending on the desired size of the nest. Sometime during the summer, the larvae exit, some of which are new queens. The others are rather useless males since their only purpose is to breed with the new queens. The old queen and the drones die off before winter. The newly bred queens do hibernate but may, if the temperatures are high enough, come out for a while. You must have found one of the new queens. The experts advise leaving them alone since they will return to the nest, but I would, if I were you, simply place the bee near the area where you found her. She should find her way back to the nest and continue the hibernation unitl true spring arrives. Nice thought, though! (By the way, thanks for the reference Athley )