In mid November 2009, an unfamiliar marsh tern appeared at Al Wathba Lake, some 40 km east of Abu Dhabi, UAE. Among some 40 Whiskered Chlidonias hybrida and two White-winged Black Terns C. leucopterus, it was distinctly darker and appeared superfi- cially like a Black Tern C. niger (and was first reported as such). The Black Tern is a rarity in the UAE (12 accepted records to 2009), so I studie...

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now