Also known as the Grey or Pied Fantail or Tīwakawaka.
Hard to photograph as they never stop moving!
Fantails are about 16cm long and half of that is the tail feathers. They are insect eaters, and catch these in flight, which accounts for their almost ceaseless activity whenever there are insects to be had.
They can raise several broods of 3-4 chicks in a season, building cup shaped nests in the forks of trees often lining them with moss secured with spider-web