Tim Laman / Rufous-sided sticky frog (Kalophrynus pleurostigma) on the ground in the lowland rainforest, Bako National Park, Sarawak, Borneo, Malaysia

Edwin Giesbers / Warty green burrowing frog (Scaphiophryne marmorata) portrait, Madagascar

Paul Bertner / Grainy Frog (Kalophrynus sp), Angkor Wat, Cambodia

Paul Bertner / Black-spotted Narrow-mouthed Frog (Kalophrynus pleurostigma), Angkor Wat, Cambodia

Paul Bertner / Black-spotted Narrow-mouthed Frog (Kalophrynus pleurostigma), Borneo, Malaysia

Paul Bertner / Grainy Frog (Kalophrynus sp), Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Nick Garbutt / Mossy Rain Frog (Scaphiophryne marmorata) climbing and camouflaged on moss covered tree trunk. Mid-altutude montane rainforest, Andasibe-Mantadia National Park, eastern Madagascar.

Chien Lee / Grainy Frog (Kalophrynus sp), Gunung Gading National Park, Malaysia

Chien Lee / Grainy Frog (Kalophrynus punctatus) camouflaged in leaf litter, Sama Jaya Nature Reserve, Kuching, Borneo, Malaysia

MYN / Joris van Alphen / Sticky frog (Kalophrynus sp.) female, Crocker Range, Borneo, Malaysia. Meetyourneighbours.net project

MYN / Joris van Alphen / Rufous-sided Sticky frog (Kalophrynus pleaurostigma) female, Crocker Range, Borneo, Malaysia. meetyourneighbours.net project

Chien Lee / Grainy Frog (Kalophrynus sp) calling, Gunung Penrissen, Sarawak, Borneo, Malaysia

Chien Lee / Malaysian Grainy Frog (Kalophrynus baluensis) camouflaged in leaf litter, Kinabalu National Park, Sabah, Borneo, Malaysia

Thomas Marent / Black-spotted Narrow-mouthed Frog (Kalophrynus pleurostigma), Forest Research Institute Malaysia, Malaysia

Thomas Marent / Black-spotted Narrow-mouthed Frog (Kalophrynus pleurostigma), Forest Research Institute Malaysia, Malaysia

Chien Lee / Variable Sticky Frog (Kalophrynus heterochirus) calling from a low perch, Borneo, Malaysia

Chien Lee / Variable Sticky Frog (Kalophrynus heterochirus) hiding under leaf, Lambir Hills National Park, Borneo, Malaysia

Chien Lee / Variable Sticky Frog (Kalophrynus heterochirus), Lambir Hills National Park, Borneo, Malaysia

Chien Lee / Grainy Frog (Kalophrynus sp) camouflaged on leaf litter, Kuching, Sarawak, Malaysia

Chien Lee / Grainy Frog (Kalophrynus sp) camouflaged on leaf litter, Kuching, Sarawak, Malaysia

Emanuele Biggi / Borneo grainy frog (Kalophrynus heterochirus) sitting in leaflitter, Kubah National Park, Sarawak, Borneo.

Chris Mattison / Kinabalu sticky frog (Kalophrynus baluensis) on white background, Sabah, Malaysian Borneo

Chris Mattison / Kinabalu sticky frog (Kalophrynus baluensis) sitting on fallen leaves, Kundasang, Malaysian Borneo

Chris Mattison / Kinabalu sticky frog (Kalophrynus baluensis) sitting on dried leaves, Kundasang, Malaysian Borneo.

Chris Mattison / Kinabalu sticky frog (Kalophrynus baluensis) mating pair, Sabah, Malaysian Borneo