Bumble Bees have decided that the bird box would be a great place to set up home, and its great watching them buzz in and out all day, they havnt caused us any bother at all being there so we aren't really worried about them. I have a question though, that I'm hoping someone can answer, quite often one will just crawl out of the hole and fall to the floor, I keep finding them either dead or very weak and on their way out, is this normal or is it something to worry about, virus', parasites etc...
Cheers.