Shelly's a great name, BTW!
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
A BBC TV show called Winterwatch aired here last week. They used a thermal camera to show how much heat birds (passerines at least) lose from their face when it's cold, and how, by tucking their heads into the feathers on their back/ behind their wing, all the heat sources disappear. The same applies with the feet. So tucking in the head v leaving it hanging / exposed or even extended (as in this thread's opening photo) may be just about the need to insulate or to lose heat.Temperature important as to whether she tucks head in feathers on back or keeps it retracted to the front.
I agree. When conditions thermally neutral for a given bird the head is neither tucked nor extended. Once our central heating is back up I'll be able to record posture when she is warm. When warm they also seem to stand up a lot during the night. Opening photo was extreme; Shelly was neither cool nor feeling at risk.A BBC TV show called Winterwatch aired here last week. They used a thermal camera to show how much heat birds (passerines at least) lose from their face when it's cold, and how, by tucking their heads into the feathers on their back/ behind their wing, all the heat sources disappear. The same applies with the feet. So tucking in the head v leaving it hanging / exposed or even extended (as in this thread's opening photo) may be just about the need to insulate or to lose heat.
good question.I wonder is some nocturnal predators such as owls can see the heat?