Hate to say this, but bozo was right about those particular bees except he was too stupid to explain why.
Years ago I was in my yard when I heard humming. It was getting louder and louder. I thought it was a small engine plane but couldn’t see it. Soon I saw this black “cloud” coming towards me. I just stood there watching it. Soon I was surrounded by millions of bees. The buzzing was deafning. Felt as if I was inside a beehive. I wasn’t afraid because I felt that these bees were on a mission, just passing through. Then they settled in my pine trees. They were there for about three days.
Later I spoke with the local beekeepers about my experience. One said he lost his bees while another one said he has too many. I found out that these bees were moving the queen or something. They also gather something from the pine trees.
It was an awesome experience.
Obviously, the bees knew........