I live in the Central Valley of California. I swear our hummers don’t migrate. I go through more nectar in the feeders in the winter than I do in the summer. Our feeders are almost always near empty from the amount of hummers that use them.
We have a large carport where we enjoy sitting. The summers last summer were so much fun to watch.
Lots of birds that migrate in one region, don’t in another.
My husband grew up in South-Central PA, within a very narrow strip running South/North, where the Robins migrate.
He was surprised to see Robins down here all year, in Maryland, when he came to live here. We looked it up, and saw that he just happened to grow up where they migrate.
(And some birds in some areas who usually migrate, for some reason decide not to do so now and then.)
You also may have ‘Anna’s’ hummers.
Contrary to popular opinion, birds don’t generally migrate to get away from the cold. They migrate to follow food sources:
http://www.birdadvisors.com/hummingbirds-california/
(Misconceptions like this remind me of Keats’ poem, and the historical predilection of poets to identify the singing nightingale as ‘female’...)
I haven’t seen any hummers where we are now in Florida. We mostly see sandhill cranes, egrets, ducks and other water birds around the small lake we are on. I sure do miss them.
BYW...do you make your own nectar (1 part sugar to 4 parts water)? I used to make at least a gallon a day.