At night, hummingbirds lower their body temperature and metabolism drastically by dropping into an energy-saving state of inactivity called torpor.
Scientists from multiple universities now find there’s more than one level of torpor: shallow and deep, plus the transition stage between levels of torpor and the normal sleep state. Their findings have been published in the Journal of Experimental Biology. [Read more…] about Hummingbirds Exert Fine Control Over Body Temperature