As summer visitors leave RSPB NI's nature reserve in Belfast harbour, the warden, Maureen, is preparing for the arrival of Konik ponies, wild ponies who will stay on the reserve all winter, grazing the undergrowth and preparing the reserve for nesting birds in the spring. Down in Colin Glen, Alannah monitors the river for pollution by looking for small creatures buried in the mud. At Victoria shopping centre, beekeeper David is preparing hives of native black bees for winter.