Well, you won't see them for a few weeks after you put them in. They will hide a lot until they feel comfortable. Mine hid in the leaf litter for the first few weeks, but now I see them quite frequently, especially at diner time!

If you do get them, remember they are most likely wild caught and should be treated for gastrointestinal parasites by a qualified veterinarian or an advanced hobbyist. A vet would be better.

My bumble bee tank is at 80% humidity.