Nuts to You!

One of the Flickr comments suggested a caption contest. I would like to know how the photo was done.

Vadim Trunov - Chess players © Flickr user Michail Kirkov under Creative Commons.

See also Chess-Squirrel-Jay in a similar pose. For more cute critters captured(?) by the same photographer, see Vadim Trunov Photos (500px.com).