It may be a good idea to try to copy the willow tit – which actually lowers its body temperature at night, to reduce heat loss and save energy.
Any better suggestions?!
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Small birds also use shivering as a technique to generate heat and maintain body temperature. Works for humans, too, although personally I prefer a nice warm fire.
It resembles our black-capped chickadee! And your post inspired me to explore whether the chickadee also employs regulated hypothermia…which it does. Here is a site where you can see how much the willow tit resembles the North American bird: http://www.nwf.org/news-and-magazines/national-wildlife/birds/archives/2008/backyard-birding.aspx
But I have no better solutions to the cold but hot soup and Glühwein and a woodstove or hearth fire!
🙂