I have seen several of my colonies with dead, or very slow moving workers with full pollen baskets. Some of the dead/very slow bees are on the ground some are on the landing board, and some are on the top board. There are about 5 or 10 bees like this on about half of the hives. The pollen is bright orange. Weather here has been cooler than usual. Bees were flying today at 48 degrees. Any ideas what might cause this?
Ben
Ben