1 The primary cause of COPD is tobacco smoke (through tobacco use or second-hand smoke).  The disease now affects men and women almost equally, due in part to increased tobacco use among women in high-income countries.
Swarming is the process by which a new honey bee colony is formed when the queen bee leaves the colony with a large group of worker bees. In the prime swarm, about 60% of the worker bees leave the original hive location with the old queen. This swarm can contain thousands to tens of thousands of bees.
Bumble bees hibernate, honey bees do not. Although honey bees and bumble bees are very closely related, their winter behaviors are very different. A colony of honey bees will live throughout the entire winter, actively keeping the nest warm and safe. Although a winter colony is much smaller than a summer colony, it will nevertheless contain thousands of individuals. They eat and work all winter longâactivity which requires a large cache of stored food.