|The Robin seemed to know that the Jay was totally preoccupied ...|
|... craning his head this way ...|
|... and that, in a very furtive manner.|
|He turned around once more, perhaps to ensure that the Grey Squirrel was nowhere to be seen ...|
|... before digging up the Squirrel's acorn ...|
|... and swallowing it.|
You might like to read more on the subject of caching and theft on this BBC report here.
And, of course, I can't be sure that this particular acorn had been buried by the squirrel!