Where do Hummingbirds go at night?

During the night, Hummingbirds go into a state called Torpor. This is a daily hibernation-like state. By reducing their body temperature through breathing, and slowing their heart rate to conserve energy throughout the night they manage to slumber until dawn. They may hang upside down appearing dead, but normally will get moving after 20 minutes to an hour. However, on colder nights it takes longer for them to awaken in the morning and that's prime time for them to be preyed upon.