Martin Gabriel / Hundreds of Heuglin's gulls (Larus heuglini) and Caspian gulls (Larus cachinnans) sourround fishermen as they land their catch, Salalah, Sultanate of Oman, February.
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Hanne & Jens Eriksen / Heuglin's gull (Larus heuglini) in flight with fish, Oman, November.
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Mike Wilkes / Heuglin's gull (Larus heuglini) standing on Tanji Beach, Gambia, West Africa.
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Bryan and Cherry Alexander / Herring gulls (Larus argentatus) scavenging for salmon guts on the shore of Anadyr Bay, Anadyr, Chukotka, Siberia, Russia. July 2013.
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Jenny E. Ross / Glaucous gull (Larus hyperboreus) chicks at a huge cliffside seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.
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Jenny E. Ross / Glaucous gull (Larus hyperboreus) chicks at a huge cliffside seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.
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Jenny E. Ross / Pair of black-legged kittiwakes (Rissa tridactyla pollicaris) on their nest at a huge cliffside seabird colony on Kolyuchin Island, Chukotka, Chukchi Sea, Siberia, Russia
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Jenny E. Ross / Pair of black-legged kittiwakes (Rissa tridactyla pollicaris) on their nest at a huge cliffside seabird colony on Kolyuchin Island, Chukotka, Chukchi Sea, Siberia, Russia
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Jenny E. Ross / Black-legged kittiwakes (Rissa tridactyla pollicaris) at a huge cliffside seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.