He quickly found a place to hide when he sensed we were getting ready to go back inside the house, and then waited for us to find him. In this photo he was only sort of hidden. Other times, one had to look quite a bit harder to find him.
Although he looked quite sleepy, it appeared that he was still listening to the conversation going on among the humans.
Who could not love that smile?
Perhaps this is the 'fetal position' pose of dogs, or maybe the 'my feet are cold' pose.