How do they survive the cold?
Anna’s Hummingbirds are known to eat a high proportion of insects as part of their diet. This protein fuel, along with nectar, and even tree sap, help sustain them.
Many of the Anna’s we’ve captured as part of our banding program have very large fat stores during the winter! This fuel helps keep them warm.
You can learn more about winter hummingbirds in The Cornell Lab of Ornithology’s “All About Birds” article: There’s a hummingbird at my feeder in the dead of winter. Will it be okay?