I am always amazed when I see an Anna’s Hummingbird at my feeder when it is 24 degrees outside. How do they survive in this cold weather in the Pacific Northwest? In cold weather, they will go into a state of “torpor”, an energy saving mode where their heart rate and body temperature are reduced to a minimum. They also survive on insects found in trees and crevices, as well as hummingbird feeders. So I will be keeping my feeders out this winter to help these beautiful birds survive.