Hummingbirds live fast. They have among the highest metabolic rates of all vertebrates, and must eat frequently to stay alive. I am excited to share with you some of the strategies they use to manage their time and their energy during the day. As a hummingbird, would you maximize energy gain or minimize energy loss, and how would your strategy change based on changing environmental conditions? And then, what do you do at night, when you do not have access to food? Hummingbirds save energy by entering the hibernation-like state of torpor. They manage to get very cold (~50°F/10°C) and slow their metabolism down. How do they do that and still stay alive? This is what I am currently working on finding out. Moving forward, for my independent research career, I plan to study comparative avian heterothermy on a global scale, starting by collecting data from the tropics while training biologists from the tropics. I plan to continue to integrate ecology, physiology, evolutionary perspectives, and molecular and imaging techniques to understand how heterothermic animals exist.