watching foxs with a thermal has been quite an eye opener (as well as a dimmer as its not good for your night vision).
We think as foxs as solitary creatures and the concept of pairs in territories but in our case with a large free range chicken unit this does not seem to apply. Over the last months we have observed up to 4 foxs in 20-30 acres, and they get up to all sorts of things, they chase each other about but seems in a playfull manner, they often sit upright and watch and listen for ages.
For example there was a pair together and then a fox some 100 yds away comes running up and seems to play and then goes away, often a pair gets seperated and one will quickly run up to the other. Their senses are remarkable and they are clearly aware of whats going on around them even on the darkests on nights.
Its also surprising how a fox can just vanish on what you think is a flat field, they often clamp down in the slightest of hollows.
Last night it took us probably 1 hour to get a small dog fox after a very protracted game of hide and seek, he was unlucky that I clocked him arround some buildings but he just vanished, we did a circuit and i spotted him again, we ended trailing him down a field between horses until he made a mistke and sat down and looked at us, possibly distracted by the two horses that crossed between us prior to the shot.
Game over but slightly sad to curtail the life of such a clever animal.