Kestrel?

Hello

I live in France and someone in my local group has posted this photograph. She thinks it’s a coucou because of the shape of the beak.

To me the colouring immediately made me think of a kestrel but I see what she means about the beak if I look at other photos of kestrels. Unfortunately the picture doesn’t enable you to get a good sense of the size. 

Can anyone more expert than me settle this once and for all?!

Thanks in advance!