Bert Willaert / School of Longfin spadefish (Platax teira), Kimbe Bay, West New Britain, Papua New Guinea

Bert Willaert / Titicaca water frog (Telmatobius culeus) swimming underwater, Lake Titicaca, Bolivia. Critically endangered species.

Bert Willaert / Titicaca water frog (Telmatobius culeus) underwater resting on the lake bed, Lake Titicaca, Bolivia. Critically endangered species.

Bert Willaert / Marbled poison dart frog (Epipedobates boulengeri) on leaf, Ecuador.

Bert Willaert / View from the top of the Ozarde waterfalls near Koyna Lake during the monsoon. Western Ghats, India, August 2010.

Bert Willaert,Bert Willaert / Portrait of a Spiny-chest Frog (Alsodes norae) endemic to Oncol Park, Chile, January

Bert Willaert / Green-backed Firecrown (Sephanoides sephanoides) nesting next to a hiking trail in Mocha Island National Reserve, Mocha Island, Chile, December

Bert Willaert,Bert Willaert / Portrait of a Darwin's Frog (Rhinoderma darwinii) Chile, Vulnerable species

Bert Willaert,Bert Willaert / Chilean slender snake (Tachymenis chilensis chilensis) Contulmo Natural Monument, Chile, December

Bert Willaert,Bert Willaert / Chile Four-eyed Frog (Pleurodema thaul) showing how it got its name - eye spots on the back of it's body, Chile, December,. Controlled conditions,

Bert Willaert / Rio Jatuntianhua Robber Frog (Pristimantis eriphus) male on a leaf. Ecuador, Vulnerable species.

Bert Willaert / Natterjack toad (Epidalea calamita / Bufo calamita) next to an empty bullet cartridge on military land, Belgium, June.

Bert Willaert / Falconer showing his juvenile Red-backed Shrike (Lanius collurio) used to catch birds of prey for domestication, with eye hood, Georgia, September 2011. No release available.

Bert Willaert / Sparrowhawk (Accipiter nisus) being caught by a falconer using a Red-backed shrike (Lanius collurio) as bait, Georgia, September 2011.

Bert Willaert / Juvenile male Caucasus viper (Daboia raddei / Vipera kaznakovi), Georgia, September.

Bert Willaert / Hunter and his dog waiting for raptors to fly over, Georgia, September 2011. No release available.

Bert Willaert / Portrait of a Marbled newt (Triturus marmoratus), Portugal, April.

Bert Willaert / Composite image of American fish species introduced to Europe: Pumpkinseed sunfish (Lepomis gibbosus, left), Brown bullhead (Ameiurus nebulosus, right) and Eastern mudminnow (Umbra pygmaea, under), ph...

Bert Willaert / Brightly Coloured Poison-Dart Frog (Oophaga sylvatica). Ecuador, South America.

Bert Willaert / Juvenile South American Common / Crested Forest Toad (Rhinella margaritifera 'complex'). Ecuador, South America.

Bert Willaert / Hognosed Pit Viper (Porthidium nasutum) coiled. Ecuador, South America.

Bert Willaert / Trivandrum / Golden Frog (Hylarana aurantiaca) looking upwards. Western Ghats, India.

Bert Willaert / Male Humayun's Wrinkled Frog (Nyctibatrachus humayuni) calling next to egg clutches on leaves. Western Ghats, India.

Bert Willaert / Banded Ground Gecko (Geckoella deccanensis) portrait. Western Ghats, India, July.

Bert Willaert / Male Alpine Newt (Ichthyosaura / Triturus alpestris) in aquatic phase. Belgium. Captive.

Bert Willaert / Pair of mating Mouse Opossums (Marmosops cf. noctivagus) hanging from prehensile tail. Ecuador,

Bert Willaert / Amplectant pair of Natterjack Toads (Epidalea / Bufo calamita) with reflection in water. Belgium, Europe, July.

Bert Willaert / Great Sundew (Drosera anglica) peduncles, with sticky droplets to ensnare insects. Belarus, Europe, July.

Bert Willaert / Aquatic Warbler (Acrocephalus paludicola) perched. Belarus, Europe, September.

Bert Willaert / Large Psammodromus (Psammodromus algirus) on sand against habitat plains. Ebro Delta, Spain.

Bert Willaert / Large Psammodromus Lizard (Psammodromus algirus) against sand. Ebro Delta, Spain.

Bert Willaert / Portrait of Balearic Green Toad (Pseudepidalea balearica / Bufo balearicus) close up, Mallorca, The Mediterranean.

Bert Willaert / Narrow-breasted snake-necked turtle (Chelodina colliei) portrait. Herdsman Lake, Perth, Western Australia. November.

Bert Willaert / Common brushtail possum (Trichosurus vulpecula) on branch at night. Dryandra Woodland, Western Australia. November.

Bert Willaert / Common brushtail possum (Trichosurus vulpecula) on branch at night. Dryandra Woodland, Western Australia. November.

Bert Willaert / Reticulated velvet gecko (Hesperoedura reticulata) on branch at night. Dryandra Woodland, Western Australia. November.

Bert Willaert / South-western crevice skink (Egernia napoleonis). Mount Trio, Stirling Range National Park, Western Australia. November.

Bert Willaert / Sign informing visitors of the use of Sodium fluoroacetate or 1080 poison for control of pest foxes and feral cats. Poison used by Western Shield wildlife recovery program in attempt to sustain popula...

Bert Willaert / National Park information signs and sign informing visitors of the use of Sodium fluoroacetate or 1080 poison for control of pest foxes and feral cats. Poison used by Western Shield wildlife recovery...

Bert Willaert / Common brushtail possum (Trichosurus vulpecula) female suckling large joey in tree at night. Stirling Range National Park, Western Australia. November.

Bert Willaert / Common brushtail possum (Trichosurus vulpecula) female suckling large joey in tree at night. Stirling Range National Park, Western Australia. November.

Bert Willaert / Common brushtail possum (Trichosurus vulpecula) female and large joey in tree at night. Stirling Range National Park, Western Australia. November.

Bert Willaert / Common brushtail possum (Trichosurus vulpecula) female and large joey in tree at night. Stirling Range National Park, Western Australia. November.

Bert Willaert / Common brushtail possum (Trichosurus vulpecula) female and large joey in tree at night. Stirling Range National Park, Western Australia. November.

Bert Willaert / South-western clawless gecko (Crenadactylus ocellatus) basking on rock. Stirling Range National Park, Western Australia. November.

Bert Willaert / Southern blind snake (Anilios australis) coiled on sand. Stirling Range National Park, Western Australia. November.

Bert Willaert / Southern blind snake (Anilios australis) coiled into ball on sand. Stirling Range National Park, Western Australia. November.

Bert Willaert / Southern blind snake (Anilios australis) coiled on sand. Stirling Range National Park, Western Australia. November.