What is that?

Chilly morning. I think it's time to look for my gloves. By afternoon it's pleasant, but for my morning walk, my hands freeze. This photo was taken on my walk with Riley this afternoon. I was zooming in on a trefoil flower, trying to get a sharp image and Riley plopped down in the tall grass next to me. I wasn't quick enough to see what he was looking at, but thought the expression was great.