Speedily snapped squirrel

Unplanned blip today - spotted this fella perched on the fence eyeing up the food on the bird table first thing this morning. I grabbed my camera and snapped through the window. Didn't have time to change the lens, and the light wasn't the best...

I wonder where he lives and whether he'll be back. Not a great fan of grey squirrels, so hope he doesn't scare away birds. Maybe the cat will scare him away?