Why are there bees in my basement?
Just so, how do I get rid of bees in my basement?
Call a local beekeeper, they usually will take away a hive for free. Its getting cold and the bees or yellow jackets that are living in your walls somewhere are looking to stay alive. Get a pro to handle it , spraying from the outside will just drive them in If they are honey bees you want to remove the nest.
Hereof, how can you tell where bees are coming from?
Bees love to get inside chimneys and build hives. If the bees are getting inside through the fireplace, they usually will fly directly to a nearby window or skylight. You won't necessarily see them inside the fireplace. Bees are attracted to sunlight, so they will naturally gravitate towards the windows.
Bees are swarming this time of year as colonies split up and a queen flies off with part of the hive looking for a new home. The lethargy, and death, may have been caused by the bees getting too cold or running out of food. That they chose your windowsill indicates there is a hive close by.