Here in AZ have had a large hawk visit our birdbath for at least 7 continuous years.
Easy to recognize as it has a leg band; must've been hurt and been rehabed and then released.
Tends to sit in middle of the large birdbath and usually pulls up one leg. Every so often takes a rather messy water-throwing bath and will stick around for a half hour or more.
Last year a 2nd, and younger, hawk showed up (girlfriend?).
This year have had 3 different hawks in birdbath at different times and seen a another really big dark one hanging around in one of our Afghan pine trees.
They seem to be not at all shy but do scare away other birds when they are about.
They can make a hell of a shrieking noise if surprised!