Trees, Shrubs and Conifers: Bee on Sourwood flowers, 3 by Pistil

Pistil wrote:
I went back a few minutes later with a macro lens, sadly the bee was gone, but I took these photos of the holes. The ones that showed up well were older ones with browned edges. Almost all of the bells had holes. While I was taking photos, an even smaller bee came along. It climbed into the hole, spent about a minute inside, then came out the bottom. It did this to several of the flowers. I guess it was a more convenient entrance than going in the bottom (I did see it go in via the bell one time).