Pete Oxford / Amazon horned frog (Ceratopyrys cornuta) eating mouse sequence: 2/2). Ecuador, South America

Pete Oxford / Amazon horned frog (Ceratopyrys cornuta) eating mouse (sequence: 1/2). Ecuador, South America

Nick Garbutt / Bornean horned frog camouflaged in leaf litter {Megophrys nasuta} Sabah, Borneo

ZSSD / Ornate Horned Frog (Ceratophrys ornata) portrait, native to Brazil, Uruguay and Argentina

Claus Meyer / Muller's Smooth Horned Frog (Proceratophrys cristiceps) soaking in shallow pond, Caatinga ecosystem, Brazil

Claus Meyer / Muller's Smooth Horned Frog (Proceratophrys cristiceps) camouflaged in mud puddle, Caatinga ecosystem, Brazil

Heidi & Hans-Juergen Koch / Cranwell's Horned Frog (Ceratophrys cranwelli) buried in soil, native to South America

Michael & Patricia Fogden / Johnson's Horned Treefrog (Hemiphractus johnsoni) in threat display, Amazon, Peru

Claus Meyer / Bahia Smooth Horned Frog (Proceratophrys boiei) portrait on forest floor, Atlantic Forest ecosystem, Brazil

Gerry Ellis / Colombian Horned Frog (Ceratophrys calcarata) portrait, South America

Heidi & Hans-Juergen Koch / Cranwell's Horned Frog (Ceratophrys cranwelli) buried in soil, native to South America

Heidi & Hans-Juergen Koch / Asian Horned Frog (Megophrys nasuta) camouflaged against leaf litter on ground, native to tropical rainforests of Asia

Mark Moffett / Southeast Asian Horned Frog (Megophrys lateralis) mimics dead leaf litter, Tam Dao National Park, Vietnam

Nick Garbutt / Bornean horned frog camouflaged, leaf litter {Megophrys nasuta} Danum valley,

Nick Garbutt / Bornean horned frog at night {Megophrys nasuta} Danum valley, Sabah, Borneo

Nick Garbutt / Bornean horned frog camouflaged on forest floor {Megophrys nasuta} Sabah, Borneo Danum

Nick Garbutt / Bornean horned frog camouflaged on forest floor {Megophrys nasuta} Sabah, Borneo Danum

Nick Garbutt / Bornean horned frog portrait {Megophrys nasuta} Danum valley, Sabah, Borneo

Nick Garbutt / Bornean horned frog on forest floor {Megophrys nasuta} Danum valley, Sabah, Borneo

Phil Savoie / Bornean horned frog camouflaged in leaf litter {Megophrys nasuta} Malaysia

Phil Savoie / Bornean horned frog camouflaged in leaf litter {Megophrys nasuta} Malaysia

Pete Oxford / Amazon horned frog (Ceratophrys cronuta), juvenile. Ecuador Amazonia, South America

Pete Oxford / Amazon horned frog (Ceratophrys cronuta) juvenile. Amazonia, Ecuador, South America

Gabriel Rojo / Horned frog {Ceratophrys ornata} La Pampa, Argentina

Piotr Naskrecki / Amazon Horned Frog (Ceratophrys cornuta) camouflaged on leaf, Sipaliwini, Surinam

Rod Williams / Wide mouth / Horned frog (Ceratophrys sp) captive, from Northern S America

Piotr Naskrecki / Amazon Horned Frog (Ceratophrys cornuta) hiding in leaf litter, Brownsberg Reserve, Surinam

Theo Allofs / Amazon Horned Frog (Ceratophrys cornuta) on leaf, Tambopata River, Peru

Pete Oxford / Amazon Horned Frog (Ceratophrys cornuta) juvenile camouflaged among leaves on rainforest floor, Ecuador

Pete Oxford / Amazon horned frog juvenile (Ceratophrys cronuta) Ecuador Amazonia