I recall only seeing them once a year here in my section of Florida, east coast, zone 9, and that is usually about Late February. I think perhaps we're on a migratory path back to the northern US but where do they migrate to? South America?
Thanks very much for the website. That's a really nice site; I've bookmarked it for future reference. Yes, it seems the entire state of Florida is part of their winter stopover. We don't see them for very long - maybe for upward of two weeks, but then again, the website said they're not always on the ground. Beautiful birds... but then, I think all birds are beautiful (even the awkward looking ones!).