He's making plans for winter Dave.
There's a feral that roams our area, we call him Scruff, got a lovely nature for a feral and over the last few years we've gained his trust and he'll happily turn up for a bowl of food if he feels the need. He will come into the kitchen for it as long as the door is ajar and he can get out but if you close the door he's not happy and cries to go out. However as it cools he'll occasionally venture through to the lounge and curl up in front of a radiator for a couple of hours before wanting to venture out.
My lass brought a cat home from the Stables years ago... when he first arrived at the yard he left a line of clawmarks up the wife's arm... eventually he became a total lap cat... sadly he's gone now but Pinky was a lovely cat... RIP little lad...
This is "Blackie", he rocked up 5 years ago, basically skin and bone and wanting to fight anything and everyone except our 2 cats who weren't bothered by him.
Took him to the vet for a checkup and the vet reckoned he was about a year old, not chipped and we ended up adopting him. He's a happy contented cat nowadays and very much part of the family.