Gerrit Vyn / Willow Ptarmigan (Lagopus lagopus) male standing on snow covered ground, vocalising in spring courtship. Males retain the white body plumage of winter plumage and molt the head and neck feathers to th...

Gerrit Vyn / Aerial view of large flock of molting Brant. These geese have found refuge on a shallow lake. During their summer moult the geese are flightless. The Teshekpuk Lake area is the most important goose m...

Flip Nicklin / Beluga (Delphinapterus leucas) whale, hundreds swim and molt in freshwater shallows, Northwest Territories, Canada

Flip Nicklin / Beluga (Delphinapterus leucas) whale, hundreds swim and molt in freshwater shallows, Northwest Territories, Canada

Gerrit Vyn / Brant geese (Branta bernicla) unable to fly during molt, Teshekpuk Lake Special Area, Alaska. July.

Suzi Eszterhas / Northern elephant seal (Mirounga angustirostris) hauled out on shore, mid molt, West San Benitos Island, Baja California, Mexico.

Pascal Pittorino / Cicada (Lyristes plebejus) after molt, close up of portrait, Var, Provence, France, July.

Pascal Pittorino / Cicada (Lyristes plebejus) drying after molt, Var, Provence, France, July.

Jan Hamrsky / Skimmer dragonfly nymph (Sympetrum vulgatum) bright due to recent molt, Europe, controlled conditions

Jan Hamrsky / Skimmer dragonfly nymph (Sympetrum vulgatum) bright due to recent molt, Europe, controlled conditions

Jan Hamrsky / Skimmer dragonfly nymph (Sympetrum vulgatum) bright due to recent molt, Europe, controlled conditions

Doug Perrine / Hawaiian monk seal (Monachus schauinslandi) resting on beach while shedding skin and fur during annual molt or moult, Black-footed albatrosses, (Phoebastria nigripes) in background, East Island, Fre...