REPTILES
At least according to our experience, the first position in this category would go to... Australia!
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ORDER CROCODYLIA (CROCODILES)
Yacaré or spectacled caiman 
(Caiman crocodylus)
Pantanal (Brazil)
Salt water crocodile 
(Crocodylus porosus)
Kakadu NP (Australia)
Fresh water crocodile 
(Crocodylus johnstoni)
Darwin (Australia)
ORDER TESTUDINES (TURTLES)
Hawkbill turtle (hatchling) 
(Eretmochelys imbricata)
Praia de Pipa (Brazil)
Fresh water turtle 
Jourama Falls (Australia)
Saw-shelled turtle 
(Elseya latisternum)
Crater Lakes NP (Australia)
ORDER SQUAMATA (SNAKES)
Amazonia (Brazil)   Olive python 
(Liasis olivaceous)
Litchfield NP (Australia)
Olive python 
(Liasis olivaceous)
Litchfield NP (Australia)
Tree snake 
Kakadu NP (Australia)
ORDER SQUAMATA (LIZARDS)
Small lizard 
(Lioaemus fitzingeri)
Valdés Peninsula (Argentina)
Iguazú (Argentina)   Black and white tegu 
(Tupinambis merianae)
Praia da Pipa (Brazil)
Small lizard  
Natal (Brazil)
 
Natal (Brazil)  Amazonia (Brazil) 
Anolis 
Rurrenabaque (Bolivia)
Paracas (Peru)  Peruvian lizard 
(Microlophus peruvianus)
Paracas (Peru)
Skink 
Angkor (Cambodia)
Centralian long nose water dragon 
(Lophognathus longirostris)
Alice Springs (Australia)
Gilbert's water dragon? 
(Lophognathus gilberti?)
West Mcdonnell Range (Australia)
Northern water dragon 
(Lophognathus temporalis)
Australia
Oriental water dragon 
(Physignathus lesuerii)
Crater Lakes NP (Australia)
Oriental water dragon (male) 
(Physignathus lesuerii)
Crater Lakes NP (Australia)
Boyd's forest dragon 
(Hypsilurus boydii)
Mt Hypipamee NP (Australia)
Two-lined dragon 
(Diporiphora sp)
Litchfield NP (Australia)
ORDER SQUAMATA, FAMILIA GEKKONIDAE (GECKOS)
Gecko 
Kakadu NP (Australia)
Leaf-tail gecko 
(Saltuarius cornutus)
Mt Hypipamee NP (Australia)
Leaf-tail gecko 
(Saltuarius cornutus)
Mt Hypipamee NP (Australia)
Spiny-tail gecko 
(Diplodactylus ciliarus)
Elliot (Australia)
ORDER SQUAMATA, FAMILIA VARANIDAE (MONITORS)
Perentie 
(Varanus giganteus)
Alice Springs (Australia)
Perentie 
(Varanus giganteus)
Alice Springs (Australia)
Spotted tree-monitor 
(Varanus scalaris)
Paluma NP (Australia)
Mertens water monitor 
(Varanus mertensi)
Litchfield NP (Australia)
Mertens water monitor 
(Varanus mertensi)
Litchfield NP (Australia)
Lace monitor (striped type) 
(Varanus varius)
Jourama Falls (Australia)
Gould's goanna 
(Varanus gouldii)
Fogg Dam reserve (Australia)
Gould's goanna 
(Varanus gouldii)
Kakadu NP (Australia)