All About Birds says this as far as their migration:
Resident or short-distance migrant. Red-winged Blackbirds in northern North America winter in the southern United States, as far as about 800 miles from their breeding ranges. Southern and some western populations don't migrate at all.
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown