It's nifty! I don't know why, other than maybe she's lazy and doesn't
want to fly from South Carolina to Mexico or Central America when she
can be assured of sugar water and a supply of little flying bugs here :)
It does get a little bit cold here, though, in the Winter. She's taken
a chance that it won't get too cold for her for the last 2 years. Then
again, hummers have that whole torpor thing going on, where their
metabolism practically shuts down at sunset. That may have something to
do with her tolerating colder temperatures here until the sun comes up
in the morning. They're interesting birds, that's for sure!