First Humming bird this year

I saw the first humming bird early last evening. I was astonished. The temperature was to go down to minus two C. I hastily cleaned the feeder and prepared a solution and then set it out before dark. This morning there was a male feeding about 7 AM when the temperature was minus one. It seemed to be functioning OK but often the frost kills them. The humming birds must have a wrong interpretation of global warning. It doesn't mean there will be no late frosts in late May and early June! Most years some birds that come early freeze to death. People find them lying underneath their feeders.