I live in the Mojave Desert and some of them overwinter here. I really wish they wouldn't as it gets terribly cold. I keep the feeders up and filled all year. I worry I'm keeping them here. I know some migrate as the population decreases dramatically but not all.Deer and door always made me curious. You can say Deer but not Deers, But you can say door and doors... Same with Goose and Geese but not Moose and Meese.
HAHA!! Yeap, same here!!
I think it's just cool how a tiny wild bird interacts so intelligently with humans.
We've even had them come up to us just before they leave for the winter time, almost like "Thank you, see yah next year, wanted to let you know we're leaving.".....
Then the next Spring, they will fly right up to our faces like "Hi! We're back, put the feeder up please!"....
Here is one of mine that overwintered and ended up on my cold pavement. After some warming he was fine