Firecrest and Black-necked Grebe

Mixed bag this weekend. Arctic Tern Swillington Ings. Bittern heard booming. A flock or about 15 Yellow Wagtails and singing Blackcap Fairburn Ings. Firecrest, Avocet sitting on eggs and Yellow Wagtail at Spurn.
Today a quick visit to Altrincham sewage works produced 2 Black-necked Grebes and yet more Yellow Wagtails.