Fabio Liverani / Freshwater Crab (Potamon fluviatile) in a shallow stream - split perspective showing crab beneath and fluvial habitat. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) brandishing claws in defensive posture. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) in a shallow stream - split perspective showing crab beneath and fluvial habitat. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) in a shallow stream - split perspective of underwater and habitat. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Crested Newt (Triturus cristatus carnifex) underwater view of female swimming near surface, Traversari lake, Campigna National Park, Emilia Romagna and Tuscany regions, Italy

Fabio Liverani / Crested Newt (Triturus cristatus carnifex) split level view of female swimming near surface, Traversari lake, Campigna National Park, Emilia Romagna and Tuscany regions, Italy

Fabio Liverani / Crested Newt (Triturus cristatus carnifex) underwater view of female swimming on surface, Traversari lake, Campigna National Park, Emilia Romagna and Tuscany regions, Italy

Fabio Liverani / Traditional fishermen of Weligama, seated on long poles, fishing with rods, Sri Lanka, June 2010

Fabio Liverani / Wolf spider (Pardosa wagleri) carrying young on its back, Lake Cernika, Slovenia

Fabio Liverani / Spectacled salamander (Salamandrina terdigitata) by eggs on stick, Acqua Cheta River, Foreste Casentinesi National Park, Italy

Fabio Liverani / Close-up of Swallowtail (Papilo machaon) wings, Emilia Romagna Region, Italy

Fabio Liverani / Leaf frog {Phyllomedusa bicolor} climbing tree trunk in rainforest, Tambopata National Reserve, Amazonia, Peru

Fabio Liverani / Tree frog {Hyla sp} feeding on grasshopper, Tambopata National Reserve, Amazonia, Peru

Fabio Liverani / Tree frog {Hyla sp} on rim of tropical fungus, Tambopata National Reserve, Amazonia, Peru

Fabio Liverani / Tree frog {Hyla sp} face portrait, Tambopata National Reserve, Amazonia, Peru

Fabio Liverani / Large headed capuchin (Sapajus macrocephalus) resting in tree, Monkey Island, River Maldonado, Tambopata National Reserve, Amazonia, Peru

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

Fabio Liverani / Crested newt {Triturus cristatus carnifex} male in breeding colours, Parco Delta del Po, NE Italy captive 2008

Fabio Liverani / Crested newt {Triturus cristatus carnifex} male in breeding colours, Parco Delta del Po, NE Italy captive 2008

Fabio Liverani / Chateau reflected in moat with water lilies at Malicorne, France.

Fabio Liverani / Five European Flamingos (Phoenicopterus ruber roseus) in flight against evening sky, delta region of the River Po, Italy

Fabio Liverani / European Edible Frog (Rana esculenta) eating a Green eyed hook tailed dragonfly (Onychogomphus forcupatus) amongst pond weed, Grigne Mountains, Lombardia Region, Italy

Fabio Liverani / Corsican Mountain Salamander (Euproctus montanus), Corsica Island, France

Fabio Liverani / African ground squirrel (Xerus sp.) looking inquisitive with arid mountain landscape in the background. Fuerteventura, Canary Isles, Spain, September 2007

Fabio Liverani / Sand and sea atCoralejo Dunes Natural Reserve, Fuerteventura, Canary Isles, Spain, September 2007

Fabio Liverani / Dune di Maspalomas, Gran Canaria, Canary Isles, Spain, September 2007

Fabio Liverani / Freshwater crab {Potamon fluviatile} in Resina river, Umbria, Italy

Fabio Liverani / Split level image of Freshwater crab {Potamon fluviatile} in Resina river, Umbria, Italy

Fabio Liverani / Common tree froglet {Hyla arborea} tadpole with front and back legs, Italy

Fabio Liverani / Common tree frog {Hyla arborea} eggs, Italy

Fabio Liverani / Dead branch with water rushing past rocks, Gorropu gorge, Sardinia, Italy

Fabio Liverani / Interior of Monteverde NR, Costa Rica

Fabio Liverani / Common tree frog {Hyla arborea} tadpole, Italy

Fabio Liverani / Alpine newt courting pair {Triturus alpestris} male on right, Italy

Rolf Nussbaumer / American oystercatcher calling {Haematopus palliatus} FL, USA

Fabio Liverani / Eggs of Agile frog {Rana dalmatina} Italy

Fabio Liverani / Alpine newt pair {Triturus alpestris} male on left with crest, Italy

Fabio Liverani / Common European toad pair in amplexus. Split level with woman sunbathing, Italy

Fabio Liverani / Oriental fire bellied toad showing warning colours.

Fabio Liverani / Yellow bellied toad defensive display - shows brightly coloured belly, Italy

Fabio Liverani / Yellow bellied toad defensive display to snake, Italy - shows brighly coloured belly

Fabio Liverani / Snake eating European edible frog, Italy

Fabio Liverani / European Edible Frog froglets with tadpole tails. Italy

Fabio Liverani / Yellow bellied toad - eggs with developing embryos, Italy. Life cycle sequence 2

Fabio Liverani / Common tree frog froglet with remains of tail, Italy. Life cycle sequence 5

Fabio Liverani / Common tree frog tadpole with hind legs and front legs developing, Italy. Life cycle sequence 4

Fabio Liverani / Green toad pair in amplexus, note eggs. Italy

Fabio Liverani / Common European toad pair in amplexus. Italy

Fabio Liverani / Common European toad pair in amplexus. Note eggs round log, Italy

Fabio Liverani / Stargazer fish hidden in sand, Mediterranean, Italy

Fabio Liverani / Common tree frog {Hyla arborea} pair in amplexus Italy

Fabio Liverani / Mudskipper (Periophthalmus species) at low tide, Sabah, Borneo

Fabio Liverani / Giant toad in muddy water, Italy, Europe

Fabio Liverani / Common tree frog pair in amplexus Italy. Note eggs. Life cycle sequence 2

Mark MacEwen / Swamp Flycatcher (Muscicapa aquatica) Queen Elizabeth National Park, Mweya Peninsula, Uganda, Africa.

Mark MacEwen / Swamp Flycatcher (Muscicapa aquatica) Queen Elizabeth National Park, Mweya Peninsula, Uganda, Africa.

Steve Knell / Spotted flycatcher (Muscicapa striata striata) on twig, Hungary. May.

Tony Heald / Black-faced Impala (Aepyceros melamis petersi) male jumping ("stotting" or "pronking") to demonstrate fitness to potential mates, competitors and predators. Devil's Thorn fl (Tribulus terrestris) in f...

Fabio Liverani / Medina quarter of Fes showing city walls. Morocco, December 2010.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) female. Ventral carapace being opened to show juvenile crabs. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / A man baking bread in a large oven. Medina quarter of Fes, Morocco, December 2010.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) on pile of mud dug out of hole. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) female. Ventral carapace being opened to show juvenile crabs. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) under rapids in a shallow stream. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Medina quarter of Fes. Morocco, December 2010.

Fabio Liverani / Medina quarter of Fes. Morocco, December 2010.

Fabio Liverani / Medina quarter of Fes showing city walls and surrounding hillside. Morocco, December 2010.

Fabio Liverani / Embroidered shoes on sale in souk / market, Fes, Morocco, December 2010.

Fabio Liverani / Keyhole doorway to Mosque Kairaouine, Africa's largest and oldest university. Fes, Morocco, December 2010.

Fabio Liverani / Man dyeing skins in the largest tannery in North Africa. Medina quarter of Fes, Morocco, December 2010.

Fabio Liverani / People working in the largest tannery in North Africa. Medina quarter of Fes, Morocco, December 2010.

Fabio Liverani / Sign painted on wall advertising an internet cafe. Medina quarter, Fes, Morocco, December 2010.

Fabio Liverani / A man leading a loaded donkey through narrow streets. Medina quarter, Fes, Morocco, December 2010.

Fabio Liverani / A man working at a carpet loom. Medina quarter, Fes, Morocco, December 2010.

Fabio Liverani / A man working in a tannery in the medina quarter of Fez, Morocco, December 2010.

Fabio Liverani / A tannery in the medina quarter of Fez, Morocco, December 2010.

Fabio Liverani / A tannery in the medina quarter of Fez, Morocco, December 2010.

Fabio Liverani / A man rests on a doorframe of a tannery. Medina quarter, Fes, Morocco, December 2010.

Fabio Liverani / Nuts, dates and sweets for sale on a stall in souk / market, Fes, Morocco, December 2010.

Fabio Liverani / Shoes for sale in a souk market, Fes, Morocco, December 2010.

Fabio Liverani / People shopping in a suq (commercial quarter). Fes, Morocco, December 2010.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) with small fish (Squalus cephalus) prey. Foreste Casentinesi National Park, Italy, September.

Fabio Liverani / Freshwater Crabs (Potamon fluviatile) mating. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crabs (Potamon fluviatile) mating. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) on pile of mud dug out of hole. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) on pile of mud dug out of hole. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) female. Juvenile crabs are protected in the ventral carapace. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) female. Ventral carapace being opened to show juvenile crabs. Foreste Casentinesi National Park, Italy, August.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) emerging from hole. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) in habitat. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) in a shallow stream - split perspective showing crab beneath and fluvial habitat. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) in a defensive posture. Split perspective view of Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) in a shallow stream - split perspective showing crab beneath and fluvial habitat. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) on a shallow stream bed. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) on a shallow stream bed. Foreste Casentinesi National Park, Italy, July.

Fabio Liverani / Freshwater Crab (Potamon fluviatile) on a shallow stream bed. Foreste Casentinesi National Park, Italy, July.