| Joined: | Mon Apr 2nd, 2012 |
| Location: | Carthew, Cornwall, United Kingdom |
| Posts: | 6877 |
| Status: |
Offline
|
http://www.fitzpatrick.uct.ac.za/sites/default/files/image_tool/images/275/Publications/PDF_Archive/Africa_Birdlife/Volume_Index/Vol2/AB02%282%2932-38.pdf
They do it for warmth!
I think there is a protection element as well, a potential predator would be 'confused' by the choice. Fish do the same when stressed.
(Link edited to remove excess http - Chris)
____________________
Still learning after all these years!
https://nikondslr.uk/gallery_view.php?user=2&folderid=none