The team are at Welney Wildlife Reserve in Norfolk. Thousands of birds flock to this wetland as it offers the perfect spot to roost, feed and shelter over the winter months. And January is a big month in the swan world as the international swan census takes place. Charlotte Smith helps out with the count. Steve Brown is on the trail of the illusive cranes that live in the washes around Welney. Margherita Taylor sees how the reserve's staff control flooding on the wetlands, and Sean Fletcher hears how mini donkeys are helping residents of a Welney care home. Tom Heap investigates the threat posed by the alien species making their way to our shores, and Adam Henson has designs on his own mini wetland down on the farm as he starts creating a dewpond.