On May 23, 5:18�pm, Val Gal wrote:
Thanks for the suggestions. �I had thought of cats, but I haven't made
the acquaintance of any in the neighborhood. �There are hawks, skunks,
raccoons, and such around, so something like that is probably more
likely. � I think I'll try the mothball suggestion. �Do hawks have a
sense of smell?

Few birds have a sense of smell. Exception eg Kiwi.
It's not hawks. The mousetrap fixes them good. Nothing else is
likely to work. There are commercial preparations but they are
ineffective in my experience. Also electronic noise generators. Again
I have heard poor reports.