Can you spot both the fox and the crow in this photo?

Crows are the fox watchers best friend. They regularly alert me to the location of a fox, and as soon as I heard this one (in the tree on the left) calling I knew it had found one, (this time it was Black-Throat.) 

So, how do you tell if a crow has found a fox? When crows see foxes they make a furious, constant cawing. They also tend to perch very low to the ground and constantly stare at the spot where the fox is. Next time I’ll see if I can get a video of it.