Anna's Hummingbird

I washed and refilled the hummingbird's feeders first thing this morning. 
After hanging up the second feeder, I went back to the first one to see if all was well.
I found a fluffed-out hummingbird already dipping its bill hungrily. 
It was 37° F (2.8° C) and the hummingbirds wasted no time in their refueling.