While preparing for my first Oxalic Acid vapor treatment for varroa, I found 3 (probably more visibly lurking around) varroa hanging out on the top of the inner cover. Oh, yes they were alive and well.... but not for long!
That's my hive tool laying there to kind of point to the mite and to give new beeks a perspective regarding size.
I would be curious if this is normal behavior or a varroa mite.