Is that a snail with a shell on the bottom of the fan where the brownish
spot is? If so, it's a tiny little thing, and did it eat that large a spot?
Of course, I may need to get better glasses.
As for the other, it does appear to be a carpenter bee, and I have
not found it written that they eat plants or wood for that matter.
The bees dig out the wood to create spaces for nest building,
so as Sue says, maybe the bee is gathering sap or some form of moisture.
Now, about that snail, if that is what it is, that snail may have family.
