Marbled - three birds on left, Kittlitz's - two birds on right
Brachyramphus marmoratus and B. brevirostris
Aialik Bay, Kenai Fjords National Park, Alaska, USA, 30 June 2007
Canon 20D, Sigma 120-300 f/2.8 APO EX DG HSM, Sigma 1.4X APO EX DG teleconverter