Lucas Bustamante / Brush footed butterfly (Lycorea sp.) caterpillar with parasitic wasp cocoons on silk threads, Yasuni National Park, Orellana, Ecuador.

Terry Whittaker / Water vole (Arvicola amphibius) feeding on Yellow flag iris (Iris pseudacorus) seed pods, Kent, England, UK. October.

Jordi Chias / Spotted catshark (Scyliorhinus canicula) just hatched from egg case that is on Seafan (Paramuricea clavata), Ullastres seamount, Costa Brava, Llafranch, Catalunya, Spain

Jan Hamrsky / Case-building caddisfly larva (Trichoptera), Europe, June. Controlled conditions.

Steve Downer / Yellow slug (Limax flavus) back lit embryo moving around in egg case.

Steve Downer / Yellow slug larva (Limax flavus) emerging from an egg case, controlled conditions.

Steve Downer / Yellow slug larva (Limax flavus) emerging from an egg case, controlled conditions.

Ingo Arndt / Caddisfly (Limnephilidae) case built out of sticks and bark fragments, Germany, November.

Ingo Arndt / Caddisfly (Limnephilus sp.) case built of sticks, wood fragments, seeds, snail shells and plant stems, Germany, November.

Jan Hamrsky / Black fly pupae (Simuliidae) attached to the stem of aquatic plant, Europe, August, controlled conditions

Paul Harcourt Davies,Paul Harcourt Davies / Emergence of Two-tailed Pasha butterfly (Charaxes jasius) Podere Montecucco. Orvieto, Umbria, Italy August. Sequence 6 of 9

Paul Harcourt Davies / Emergence of Two-tailed Pasha butterfly (Charaxes jasius) Podere Montecucco. Orvieto, Umbria, Italy August. Sequence 1 of 9

John Cancalosi / Adult Common morpho butterfly (Morpho peleides) emerging from chrysalis, Costa Rica. Sequence 1/4.

Gavin Hellier / Traffic lights and office buildings illuminated at dusk, part of new urban development, modern architecture skyscrapers in Potsdamer Platz, Berlin, Germany, 2007. As was the case in much of Berlin,...

Ross Hoddinott / 2020VISION / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case, Cornwall, UK. April

Alex Hyde / Apollo silkmoth (Ceranchia apollina) close up of cocoon showing silk fibres, originating from Madagascar. Captive.

Jan Hamrsky / Mosquito (Culex pipiens) larva below its pupa case. Europe, August.

Ross Hoddinott / 2020VISION / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case, Cornwall, UK. April Sequence 5/7

Ross Hoddinott / 2020VISION / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case, Cornwall, UK. April Sequence 7/7

Ross Hoddinott / 2020VISION / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case, Cornwall, UK. April Sequence 6/7

Guy Edwardes / 2020VISION / Four-spotted chaser dragonfly (Libellula quadrimaculata) in rain, Westhay SWT reserve, Somerset Levels, England, UK, June. Photographer quote: 'Photographing in wet conditions can often result in inte...

Mark Hamblin / 2020VISION / View from Stac Polliadh with double rainbow and rain clouds over Cul Mor, Coigach, Highland, Scotland, November. Photographer quote: "Standing on a rain lashed and windswept mountain side all morning...

Sergey Gorshkov / Salmon (Salmonidae) fry with egg case still attached, Lake Kuril, Kamchatka, Far East Russia, January

Lynn M Stone / Domestic pig, White piglet in wooden case with bee balm flowers, Illinois, USA

Georgette Douwma / Pink anemonefish (Amphiprion perideraion) with anemone showing the effects of bleaching. The bleached anemone is almost white, whereas the unbleached anemone is brown due to the presence of symbiotic...

Alex Hyde / Silk moth (Saturniidae) cocoon, used in textile production, photographed on a white background. Maroantsetra, Northeast Madagascar.

Stephen Dalton / Broad bodied chaser dragonfly (Libellula depressa) recently emerged from larval case, UK

Eric Baccega / Portrait of Lani hunters with painted faces, head-dressed, nose adornment and penis case / gourd, Baliem valley, West Papua, former Irian-Jaya, Indonesia, August 2002

Ingo Arndt / Four spotted libellula dragonfly / (Libellula quadrimaculata) adult freshly emerged from larval case, Germany.

Ingo Arndt / Adult Egyptian Locust (Anacridium aegyptium) emerging from nymphal skin, captive, Africa. Winner of Fritz Polking portfolio prize, GDT 2012 competition.

Wild Wonders of Europe / Smit / Vagrant darter (Sympetrum vulgatum) on twig with larval case, Gornje Podunavlje Special Nature Reserve, Serbia, June 2009. BOOK & WWE OUTDOOR EXHIBITION.

Alex Hyde / Peacock Butterfly {Inachis io} emerging from chrysalis against white background. Sequence 6/6.

Alex Hyde / Peacock Butterfly {Inachis io} emerging from chrysalis against white background. Sequence 4/6.

Alex Hyde / Peacock Butterfly {Inachis io} emerging from chrysalis against white background. Sequence 3/6.

Wild Wonders of Europe / Smit / Vagrant darter (Sympetrum vulgatum) on twig with larval case, Gornje Podunavlje Special Nature Reserve, Serbia, June 2009

Wild Wonders of Europe / Smit / Vagrant darter (Sympetrum vulgatum) on twig with larval case, Gornje Podunavlje Special Nature Reserve, Serbia, June 2009

Wild Wonders of Europe / Smit / Vagrant darter (Sympetrum vulgatum) on twig with larval case, Gornje Podunavlje Special Nature Reserve, Serbia, June 2009

Ross Hoddinott / Large red damselfly (Pyrrhosoma nymphula) emerging from nymphal case. Broxwater, Cornwall, UK. Sequence 2/3

Wild Wonders of Europe / Widstrand / Eurasian brown bear (Ursus arctos) looking at camera in protective case, Suomussalmi, Finland, July 2008

Fabio Liverani / Cicada recently emerged from larval case, inflating its wings, sequence 4/5, Tambopata National Reserve, Amazonia, Peru

Ross Hoddinott / Common darter dragonfly {Sympetrum striolatum} recently emerged from nymphal case, Cornwall, UK. June. Winner of Seasons category in the BWPA 2011 competition

Ross Hoddinott / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case. Cornwall, UK.

Ingo Arndt / Pupa of Madagascar moon moth (Argema mittrei) Madagascar (Captive)

Ingo Arndt / Pupa of Common sargeant butterfly (Athyma perius)

Niall Benvie / The case for house insulation - Cabin with melted snow around it illustrating the need for heat insulation, Norway 2007

Ross Hoddinott / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case, Cornwall. UK

Ross Hoddinott / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case, Cornwall. UK

Doug Wechsler / Viceroy butterfly pupa {Limenitis archippus} on leaf stem. USA. Captive.