Wilthorpe Marsh sewage farm 18/12/17.

Late aft. Water Pipit again on filter bed carousel then flew e. down valley at 3-40pm presumably to roost. Meadow Pipit 20, Pied Wagtail c.70 flew towards town centre at dusk. 5 Goldcrests and still a Magpie roost here. Counted tonight with about 160 birds but possibly more as copse only seen from one side.