Yes, it’s a shadow.
My human shot this image with one hand ‘from the hip’ while riding his bicycle
(and trying to keep up with me) on my late afternoon walk (run)
in the big open fields just west of our town.
Look what the low sunlight perspective did to my human’s head!
It’s smaller than mine. Ha!
We both love these rides. My human can release the mental leftovers from work.
And I can really exercise my muscles and my heart and my lungs and my legs and...
...feel so happy!
But you’re right of course. It’s just a dog and a man and a bicycle.