So true about the sparrows. Mike jokes about how they have us trained, because we can see the food plate from our dining room table and are careful not to startle them. And they are unconcerned if I'm standing there, but any movement triggers them. In fact they go in and out in waves continually with no trigger that I can spot.

That's neat that the other birds have learned though. I can't say I've noticed anything of that kind with our visitors even though we've been putting food out for years. In fact, we've been wondering where the mourning doves have gone. We used to have them all the time -- they'd sit on our shelves and warm up near our windows -- yet haven't seen any for a few months now.