One of northeast Scotland’s top wildlife watching sites is sporting a new bird hide in time for summer. Forvie national nature reserve, just north of Aberdeen, is famous for wading birds and geese. The hide overlooks the Ythan estuary at Waulkmill, a vast area of mudflats, reed beds and nearby fields. Recent counts have found over 22,000 pink-footed geese use the estuary and nearby fields. Visitors also often see large numbers of other birds like lapwing, golden plover and redshank. One of the reasons the hide’s location is terrific for bird-watching is the mud: the mud in front of the…