I've seen robins, mockingbirds, blackbirds and a few swallows around and in front of mine. The only danger I've seen, has been when my Chessy pup was out there last week during the afternoon orientation flights of all three hives and she tried to eat one. Needless to say she still gets a kick out of being out there during orientation flights but appitizers are out of the question. The cat learned long ago to just sleep on top of the hives.
I have seen birds eat what is on the ground in front of the hives including freshly killed wasps hornets and bumblebees.