As the days get shorter, autumn and winter beckon. On a night hunt in Caernarfon, Iolo finds spiders that can give a good bite. In Cardiff, robins sing all night long. In Hirwaun, a mistle thrush fights with a car. Stunning birds from Scandinavia drop in at a retail park in Llansamlet. On a housing estate in Llangefni on Anglesey, rare red squirrels visit for their winter supply of nuts. Starlings flock together in Aberafan and hundreds of pied wagtails come to roost and enjoy a good night's sleep on a busy Newport roundabout.