Animals in torpor drop their body temperature and metabolism, slowing down a suite of physiological processes, as low as their physiology and the ambient temperatures will allow. Some species can drop their body temperatures by 23-34°C, entering deep torpor, while many others have relatively high body temperatures while in shallow torpor (e.g., 3-10°C below normothermy). Studies on mammals show that potential costs of using deep torpor include increased predation risk, inhibited immune function, and a lack of restorative sleep. Therefore even for species that are capable of deep torpor, facultatively adopting a shallower form of torpor might sometimes be a better strategy for balancing energy savings against these potential costs of deep torpor. However, little empirical evidence exists for a spectrum between avian deep and shallow torpor within species. We explored whether hummingbirds, which are known to use deep torpor frequently, are also capable of shallow torpor, with intermediate reductions in their body temperature and metabolic rate. We took infrared videos of three hummingbird species under natural temperature and light cycles, and found that they all used both deep and shallow torpor, often on the same night. The species varied in their use of shallow torpor from averages of 5% of the night to 35% of the night. The presence of this torpor spectrum indicates that some birds have very fine control of their sleep and torpid metabolism. I will next be using transcriptomics to investigate the physiological differences between sleep and shallow and deep torpor.