Ingo Arndt / Tisza mayfly (Palingania longicauda) hanging on branch and moulting, River Tisza, Hungary, June

Ingo Arndt / Mayfly (Palingenia longicauda) hanging on leaf and moulting, Tisza river, Hungary, sequence 5/7, June

Ingo Arndt / Mayfly (Palingenia longicauda) hanging on leaf and moulting, Tisza river, Hungary, sequence 6/7, June

Ingo Arndt / Mayfly (Palingenia longicauda) hanging on leaf and moulting, Tisza river, Hungary, sequence 3/7, June

Ingo Arndt / A large group of King Penguin (Aptenodytes patagonicus) moulting, St Andrews Bay, South Georgia Island, Southern Ocean, Antarctic Convergence.

Ole Jorgen Liodden / Arctic fox (Alopex lagopus lagopus) grooming in summer fur, Spitsberg, Svalbard, Norway, August.

Ole Jorgen Liodden / Arctic fox (Alopex lagopus lagopus) mid moult into summer fur, back lit portrait, Spitsbergen, Svalbard, Norway, June.

Pete Oxford / Waved Albatross (Phoebastria irrorata) molting juvenile, Espanola Island, Galapagos Islands, Ecuador

Pete Oxford / Waved Albatross (Phoebastria irrorata) molting juvenile, Espanola Island, Galapagos Islands, Ecuador

Pete Oxford / Waved Albatross (Phoebastria irrorata) molting juvenile, Espanola Island, Galapagos Islands, Ecuador

Stefan Christmann / Emperor Penguin (Aptenodytes forsteri) molting chick, Queen Maud Land, Antarctica

Pascal Kobeh / Aggregation of thousands of Spider crabs (Leptomithrax gaimardii) for moulting, South Australia Basin, Australia. Pacific Ocean.