Mourning doves falling in accidentally is still the best way to know when the water gets too low in the bird bath.
This one decided to just go with it and looked like a duck decoy just sitting in the water for awhile.
This is the pole I set up with the wreath feeder that the blue jays love with 2 baffles to keep the squirrels off, and the baffles work. I've seen cardinals and red-bellied woodpeckers feeding from it too, but nowhere near as much as the blue jays, they're nonstop visitors every day.
Getting a drink the other day.
And his pretty blue back before flying off.