Right.. we don't get the yellow crowned herons here, we have black crowned night Herons in our neck of the woods. GBH's are pretty common and I see Green Backed Herons at dusk.. they are shy little guys. I have seen Snowy Egrets in the neighbor's pool.. probably because their pool is more out in the open.
Bats skim our pool nightly for a drink after their long hot day spent in our neighbors attic (we've counted as many as 200 dripping out of the eave) under the hot Carolina sun. When we see the first one skim the pool, we move out of the "runway" to allow them their drink. We have never once felt the least bit skittish as they are excellent navigators. I wish the bats ate more mosquitoes, but most bats prefer more bang for the buck delicacies such as moths etc.
Do the neighbors plan to eradicate the bats? We bought a house that had had a bat colony for years snd the amount of guano in the stud bays behind the drywall was impressive. Had to spray foam insulate to seal in the urine stench before replacing the drywall. It was a long hot task because we had to wear Tyvrk suits and respirators to work.