Toni - Hmmmm .... I don't think I would like Denver weather. Especially the lack of humidity. We deal with hurricanes, mosquitoes, and lots of poisonous critters and plants, but at least all kinds of plants and wildlife do really well in FL climate.
The Ruby-throated hummingbird (RTH) is known to over-winter in FL, Mexico, and Cuba. I hosted at least 4 birds this Fall/Winter. In several areas of FL a new group of RTHs will migrate in to breed here as the northern hummers leave. I've only seen a female RTH for a couple of summers. So not as many breeding in my area. They use the nectar flowers when in bloom and the feeders that I hang out for them. I have even had the good luck of seeing a female Rufous stop by to use my feeders for a entire day as she was heading south to wherever. Folks on the west coast of FL see numerous species of hummingbirds. Wished some of those birds would head further southeast, too! I hope to have hummers banded next Winter to find out if they are returning to my yard every Fall/Winter. Mine are currently all males. I used to host females (and 2 were banded in my yard in 2011), but the males found my yard and ran them off. The males are typically more aggressive. I love Winter in Florida because the bird action is such fun! I had Painted Buntings banded for the first time in my yard this Winter. The bander caught and banded 5 of them, but saw at least another 7 she didn't capture and band. She may be back to try again before they migrate to North Carolina and areas further north of me. I have a typical yard in a subdivision. Lots of trees around me though, which is probably why I see so many birds. And I plant a lot of nectar plants and hang seed and sugar-water feeders up and maintain them all Fall/Winter. The birds have discovered where to come to eat!
I pass the word on to them! 
