Bert Willaert / Moon Island (Isla de la Luna) in lake Titicaca, Bolivia, October 2013.

Bert Willaert / Common marsupial frog (Gastrotheca marsupiata) portrait, Bolivia, October.

Bert Willaert / Male Flat fingered robber frog (Pristimantis platydactylus) on agave leaf, Bolivia, October.

Bert Willaert / Male Flat fingered robber frog (Pristimantis platydactylus) on agave leaf, Bolivia, October.

Bert Willaert / Unpaved road with the village of Totoral and Illimani Mountain partially obscured by clouds in the distance, Bolivia, October 2013.

Bert Willaert / Frog (Psychrophrynella illimani) walking, taken against white background, Bolivia, October 2013, Critically endangered.

Bert Willaert / Underside of Frog (Psychrophrynella illimani) taken against white background, Bolivia, October 2013, Critically endangered.

Bert Willaert / Frog (Psychrophrynella illimani) portrait, Bolivia, October 2013, Critically endangered.

Bert Willaert / Frog (Psychrophrynella illimani) walking on plants, Bolivia, October 2013, Critically endangered.

Bert Willaert / Titicaca water / Lake Titicaca frog (Telmatobius culeus) camouflaged amongst stones, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Dead Titicaca water / Lake Titicaca frog (Telmatobius culeus) on bottom on lake, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Titicaca water / Lake Titicaca frog (Telmatobius culeus) on bottom of lake, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Titicaca water / Lake Titicaca frog (Telmatobius culeus) amongst stones on the bottom of the lake, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Light coloured Titicaca water / Lake Titicaca frog (Telmatobius culeus) resting, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Titicaca water / Lake Titicaca frog (Telmatobius culeus) swimming, seen from below, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Researcher holding a Titicaca water / Lake Titicaca frog (Telmatobius culeus) underwater, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Reseachers and snorkling equipment in a boat on Lake Titicaca, Bolivia, October 2013. Model Released.

Bert Willaert / Small waterfall with abundant mosses, High Andes, Bolivia, October 2013.

Bert Willaert / Yellow morph of (Psychrophrynella illimani) on plant, Bolivia, October 2013, Critically endangered.

Bert Willaert / Lizard (Proctoporus sp) Andes, taken against white background, Bolivia.

Bert Willaert / Lizard (Proctoporus sp) Andes, taken against white background, Bolivia.

Bert Willaert / Yellow morph of (Psychrophrynella illimani) taken against white background, Bolivia, October 2013, Critically endangered.

Bert Willaert / Frog (Psychrophrynella illimani) in habitat, Bolivia, October 2013, Critically endangered.

Bert Willaert / Entrance of a goldmine, Andes, Bolivia, October 2013.

Bert Willaert / Titicaca water / Lake Titicaca frog (Telmatobius culeus) swimming towards camera looking into the lens, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Titicaca water / Lake Titicaca frog (Telmatobius culeus) swimming through vegetation, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Titicaca water / Lake Titicaca frog (Telmatobius culeus) on bottom of lake, Lake Titicaca, Bolivia, October, Critically endangered.

Bert Willaert / Biology student holding one of the largest known specimens of (Pscyhrophrynella illimani) Bolivia, November 2013, Critically endangered, Model released.

Bert Willaert / Crop fields along a stream where mainly potatoes are cultivated, near Totoral, High Andes, Bolivia, November 2013.

Bert Willaert / Villager showing an intermediate product during gold extraction, Village in the Andes, Bolivia, November 2013.

Bert Willaert / Villager using his bare hands to mix the toxic mercury during gold extraction, Bolivia, November 2013.

Bert Willaert / Gold extracted from sand using mercury, Totora, Andes, Bolivia, November 2013.

Bert Willaert / Gold mining site near Iquico, High Andes, Department of La Paz, Bolivia, November 2013.

Bert Willaert / Map treefrog (Hypsiboas geographicus) taken against white background, Bolivia.

Bert Willaert / Orinoco lime treefrog (Sphaenorhynchus lacteus) portrait, Bolivia, November.

Bert Willaert / Orinoco lime treefrog (Sphaenorhynchus lacteus) portrait, Bolivia, November.

Bert Willaert / Beireis' treefrog (Dendropsophus leucophyllatus) portrait, Bolivia, November.

Bert Willaert / Path on the Yunga Cruz trail in a steep sided valley with low clouds, Precolumbian / Inca trail, Andes, Chunavi, Bolivia, November 2013.

Bert Willaert / Male Frog (Psychrophrynella illimani) attending an egg clutch, taken against white background, Bolivia, November 2013, Critically endangered.

Bert Willaert / Male Frog (Psychrophrynella illimani) attending an egg clutch, taken against white background, Bolivia, November 2013, Critically endangered.

Bert Willaert / Frog (Psychrophrynella illimani) on moss, Bolivia, November 2013, Critically endangered.

Bert Willaert / Frog (Psychrophrynella illimani) on moss, Bolivia, November 2013, Critically endangered.

Bert Willaert / Male Frog (Psychrophrynella illimani) with newly hatched offsping, taken against white background, Bolivia, November 2013, Critically endangered.

Bert Willaert / Male Frog (Psychrophrynella illimani) with newly hatched offspring, Bolivia, November 2013, Critically endangered.

Bert Willaert / Spot legged poison frog (Ameerega picta) on the forest floor, Bolivia, November.

Bert Willaert / Spot legged poison frog (Ameerega picta) on leaf, Bolivia, November.

Bert Willaert / Spot legged poison frog (Ameerega picta) portrait, taken against white background, Bolivia, November.

Bert Willaert / Marbled white lipped frog (Leptodactylus elenae) on leaf, Bolivia, November.

Bert Willaert / Rufous frog (Leptodactylus fuscus) portrait, taken against white background, Bolivia.

Bert Willaert / Marbled white lipped frog (Leptodactylus elenae) portrait, taken against white background, Bolivia.

Bert Willaert / Red snouted treefrog (Scinax ruber) portrait, taken against white background, Bolivia.

Bert Willaert / La Paz robber frog (Oreobates cruralis) taken against white background, Bolivia.

Bert Willaert / Polka dot treefrog (Hypsiboas punctatus) taken against white background, Bolivia.

Bert Willaert / Orinoco lime treefrog (Sphaenorhynchus lacteus) portrait, taken against white background, Bolivia.

Bert Willaert / White-lined leaf frog (Phyllomedusa vaillantii) sitting, taken against white background, Bolivia.

Bert Willaert / White-lined leaf frog (Phyllomedusa vaillantii) sitting, taken against white background, Bolivia.

Bert Willaert / Seven preserved specimens of (Psychrophrynella illimani) showing ventral variation, collected by scientists, Bolivia, Critically endangered.

Bert Willaert / South American common toad (Rhinella margaritifere complex) portrait, Bolivia, November.

Bert Willaert / Three striped rocket frog (Allobates trilineatus) on leaf, Bolivia, November.

Bert Willaert / Three striped rocket frog (Allobates trilineatus) on leaf, Bolivia, November.

Bert Willaert / Bolivian bleating frog (Hamptophryne boliviana) portrait, on leaf, Bolivia, November.

Bert Willaert / Bolivian bleating frog (Hamptophryne boliviana) on leaf, Bolivia, November.

Bert Willaert / Bolivian bleating frog (Hamptophryne boliviana) portrait, taken against white background, Bolivia.

Bert Willaert / Bolivian bleating frog (Hamptophryne boliviana) taken against white background, Bolivia.

Bert Willaert / Male Rivero's Amazon treefrog (Dendropsophus riveroi) calling, Bolivia, November.

Murray Cooper / Tropical Setophaga (Setophaga pitiayumi), Andes, Ecuador

Tui De Roy / White winged brush finch (Atlapetes leucopterus) Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, West slope, Tropical Andes, Ecuador

Tui De Roy / White-throated quail-dove (Geotrygon frenata) at rest, Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, Ecuador

Tui De Roy / White bellied woodstar (Chaetocercus mulsant) in flight, Guango private reserve, Papallacta Valley, Andean Cloud Forest, East slope, Ecuador

Tui De Roy / White bellied woodstar (Chaetocercus mulsant) in flight, Guango private reserve, Papallacta Valley, Andean Cloud Forest, East slope, Ecuador

Tui De Roy / White bellied woodstar (Chaetocercus mulsant) in flight, Guango private reserve, Papallacta Valley, Andean Cloud Forest, Ecuador

Tui De Roy / White bellied woodstar (Chaetocercus mulsant) Tandayapa Valley, 1500m altitude, Andean cloud forest, Ecuador

Tui De Roy / Western emerald hummingbird (Chlorostilbon melanorhynchus) Tandayapa Valley, 1500m altitude, Andean cloud forest, Ecuador

Tui De Roy / Violet tailed sylph (Aglaiocercus coelestis) Angel Paz reserve, Mindo region, Andean cloud forest, Ecuador

Tui De Roy / Violet tailed sylph (Aglaiocercus coelestis) Angel Paz reserve, Mindo region, Andean cloud forest, Ecuador

Tui De Roy / Violet tailed sylph (Aglaiocercus coelestis) Angel Paz reserve, Mindo region, Andean cloud forest, Ecuador

Tui De Roy / Violet tailed sylph (Aglaiocercus coelestis) Angel Paz reserve, Mindo region, Andean cloud forest, Ecuador

Tui De Roy / Velvet purple coronet (Boissonneaua jardini) Angel Paz reserve, Mindo region, Andean cloud forest, Ecuador

Tui De Roy / Tyrian metaltail (Metallura tyrianthina) profile, Yanacocha Reserve, Jocotoco Foundation, 3,200m altitude on west slope of Pichincha Volcano, Andean cloud forest, Ecuador

Tui De Roy / Turquoise jay (Cyanolyca turcosa) portrait, Guango private reserve, Papallacta Valley, Andean Cloud Forest, Ecuador

Tui De Roy / Turquoise jay (Cyanolyca turcosa) profile portrait, Guango private reserve, Papallacta Valley, Andean Cloud Forest, Ecuador

Tui De Roy / Turquoise jay (Cyanolyca turcosa) raising parasitic Giant cowbird chick, Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valleyk, Andean cloud forest, Ecuador

Tui De Roy / Tourmaline sunangel (Heliangelus exortis) Guango private reserve, Papallacta Valley, Andean Cloud Forest, Ecuador

Tui De Roy / Toucan barbet (Semnornis ramphastinus) Angel Paz reserve, Mindo region, Andean cloud forest, West slope, Tropical Andes, Ecuador

Tui De Roy / Toucan barbet (Semnornis ramphastinus) Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, Ecuador

Tui De Roy / Toucan barbet (Semnornis ramphastinus) Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, Ecuador

Tui De Roy / Toucan barbet (Semnornis ramphastinus) Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, Ecuador

Tui De Roy / Tawny antpitta (Grallaria quitensis) found in high altitude Paramo grassland, Papallacta Valley, Tropical Andes, Papallacta Valley, Ecuador

Tui De Roy / Sword billed hummingbird (Ensifera ensifera) showing how it uses its long beak to feed on specific flowers, Yanacocha Reserve, Jocotoco Foundation, 3,200m altitude on west slope of Pichincha Volcano,...

Tui De Roy / Sword billed hummingbird (Ensifera ensifera) profile showing beak is longer than body, Yanacocha Reserve, Jocotoco Foundation, 3,200m altitude on west slope of Pichincha Volcano, Andean cloud forest,...

Tui De Roy / Sword billed hummingbird (Ensifera ensifera) profile showing beak is longer than body, Yanacocha Reserve, Jocotoco Foundation, 3,200m altitude on west slope of Pichincha Volcano, Andean cloud forest,...

Tui De Roy / Sword billed hummingbird (Ensifera ensifera) profile showing beak is longer than body, Yanacocha Reserve, Jocotoco Foundation, 3,200m altitude on west slope of Pichincha Volcano, Andean cloud forest,...

Tui De Roy / Sword billed hummingbird (Ensifera ensifera) profile in flight, Yanacocha Reserve, Jocotoco Foundation, 3,200m altitude on west slope of Pichincha Volcano, Andean cloud forest, Ecuador

Tui De Roy / Streaked tuftedcheek ( Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, West slope, Tropical Andes, Ecuador

Tui De Roy / Streaked tuftedcheek (Pseudocolaptes boissonneautii) bird, Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, West slope, Tropical Andes, Ecuador

Tui De Roy / Speckled hummingbird (Adelomyia melanogenys) feeding at flowers, Bellavista cloud forest private reserve, 1700m altitude, Tandayapa Valley, Andean cloud forest, Ecuador