Agustin Esmoris / Southern Right Whale (Eubalaena australis) surfacing with Kelp Gull (Larus dominicanus) picking off lice, Chubut, Argentina, sequence 1 of 4

Nick Garbutt / Flock of Kelp / Southern black backed Gulls (Larus dominicanus) flying over iceberg. Graham Passage, Antarctic Peninsula, Antarctica. February. (digitally altered image)

Ann & Steve Toon / Kelp (Cape) gulls (Larus dominicanus) feeding on Cape fur seal carcass, Western Cape, South Africa.

Stefan Christmann / Kelp gull (Larus dominicanus) in flight. Atka Bay, Antarctica. January.

Agustin Esmoris / Southern Right Whale (Eubalaena australis) surfacing with Kelp Gull (Larus dominicanus) picking off lice, Chubut, Argentina, sequence 3 of 4

Lucas Bustamante / Brown fur seal (Arctocephalus pusillus) colony sleeping with Kelp gull (Larus dominicanus) feeding on carcass of dead pup, Cape Cross, Erongo, Namibia.

Ingo Arndt / Southern black backed / Kelp gull (Larus dominicanus) on water surface, King Edward Point, South Georgia Island, February

Ingo Arndt / Southern black backed / Kelp gull (Larus dominicanus) feeding on mussel, King Edward Point, South Georgia Island, February

Ingo Arndt / Kelp / Southern Black-Backed Gull (Larus dominicanus) subadult feeding on Cape Fur Seal (Arctocephalus pusillus) pup carcass, Cape Cross, Namibia.

Rick Price / Two Humpback whales (Megaptera novaeangliae) breathing at the surface with Dominican gulls (Larus dominicanus), Charlotte Bay, Portal Point, Antarctic Sound, Antarctica.

Rick Price / Humpback whale (Megaptera novaeangliae) breathing at the surface with Dominican gulls (Larus dominicanus), Charlotte Bay, Portal Point, Antarctic Sound, Antarctica.

Glenn Bartley/ BIA / Kelp Gull (Larus dominicanus) on beach, Falkland Islands