Michael D. Kern / Inland bearded dragon (Pogona vitticeps) captive, from Australia

Michael D. Kern / Inland bearded dragon (Pogona vitticeps) captive, from Australia

Roland Seitre / Central / Inland Bearded Dragon (Pogona vitticeps) basking. Alice Springs, Northern Territory.

Martin Willis / Inland Bearded Dragon (Pogona vitticeps) in defensive posture, Bedourie, Queensland, Australia

Martin Willis / Inland Bearded Dragon (Pogona vitticeps) basking, Simpson Desert, Northern Territory, Australia

Michael D. Kern / Inland bearded dragon (Pogona vitticeps) captive, from Australia

Stephen Dalton / Close up of eye of Bearded dragon lizard (Amphibolurus barbatus) controlled conditions, native to Australia

Stephen Dalton / Close up of eye of Bearded dragon lizard (Amphibolurus barbatus) controlled conditions, native to Australia

Stephen Dalton / Bearded dragon lizard (Amphibolurus barbatus) controlled conditions, native to Australia

Stephen Dalton / Bearded dragon lizard (Amphibolurus barbatus) controlled conditions, native to Australia

Steven David Miller / Common Bearded Dragon / Eastern Bearded Dragon (Pogona barbata) warming in sun, Bundaberg, Queensland, Australia.

Steven David Miller / Common Bearded Dragon / Eastern Bearded Dragon (Pogona barbata) warming in sun, Bundaberg, Queensland, Australia

Robert Valentic / Dwarf bearded dragon lizard {Pogona minor mitchelli} threat display to frighten off predator, Derby, Western Australia

Robert Valentic / Inland / Central bearded dragon lizard {Pogona vitticeps} male defensive threat display, Kulgera, Northern Territory, Australia

Robert Valentic / Eastern bearded dragon lizard {Pogona barbata} male enacting a defensive display towards a perceived threat, West Wyalong, New South Wales, Australia

Miles Barton / Inland Bearded Dragon (Pogona vitticeps) adult on barbed wire fence at farm in Hawker, Flinders Ranges, South Australia

Petra Wegner / Inland Bearded Dragon (Pogona vitticeps), captive, originally from Australia, being fed an insect by hand

Petra Wegner / Inland Bearded Dragon (Pogona vitticeps), captive, originally from Australia, being fed insect by hand

Petra Wegner / Inland Bearded Dragon (Pogona vitticeps) profile, captive, originally from Australia

Petra Wegner / Inland Bearded Dragon (Pogona vitticeps), captive, originally from Australia

Petra Wegner / Inland Bearded Dragon (Pogona vitticeps), captive, originally from Australia, being held

Petra Wegner / Inland Bearded Dragon (Pogona vitticeps), captive, originally from Australia

Petra Wegner / Inland Bearded Dragon (Pogona vitticeps), captive, originally from Australia, being fed an insect by hand

Robert Valentic / Central / Inland bearded dragon {Pogona vitticeps} male defensive display, South Australia

Michael D. Kern / Inland bearded dragon {Pogona vitticeps} captive, Australia

Mary McDonald / Bearded dragon threat display (Amphibolurus barbatus) Australia

Robert Valentic / Eastern bearded dragon threat display {Pogona barbata} Australia

David Kjaer / Inland bearded dragon {Pogona vitticeps} captive

Robert Valentic / Inland bearded dragon, female threat display {Pogona vitticeps} Queensland, Australia

Robert Valentic / Inland bearded dragon, male threat display {Pogona vitticeps} NT, Australia

Robert Valentic / Inland bearded dragon, gravid female threat display {Pogona vitticeps} Queensland, Australia

Steven David Miller / Eastern Bearded Dragons {Pogona barbata} mating on rock, Australian Reptile Park, Gosford New South Wales, Australia

WILLIAM OSBORN / Inland bearded dragon {Amphibolurus vitticeps} displaying, Queensland, Australia

Mary McDonald / Bearded lizard {Amphibolumus barbatus} Australia

Dave Watts / Inland Bearded Dragon {Pogona vitticeps} head profile with mouth open, Queensland, Australia.

Philippe Clement / Inland bearded dragon {Pogona vitticeps} Australia, captive.

Philippe Clement / Inland bearded dragon {Pogona vitticeps} Australia, captive.

Patricio Robles Gil / Inland bearded dragon {Pogona vitticeps} displaying, Australia

Robert Valentic / Lawson's bearded dragon {Pogona henrylawsoni} threat display, Queensland, Australia.

WILLIAM OSBORN / Inland bearded dragon lizard threat display, Australia. {Amphibolurus vitticeps}

John Cancalosi / Bearded dragon lizard, defense display {Amphibolurus barbatus} Queensland, Australia.

Michael & Patricia Fogden / Eastern Bearded Dragon (Pogona barbata) defensive display threat, Australia

Gerry Ellis / Bearded Dragon (Amphibolurus barbatus) in defensive display, Australia

Mary McDonald / Bearded lizard / dragon {Amphibolumus barbatus} threat display, Australia. Captive

Steven David Miller / Inland / Central bearded dragon {Pogona vitticeps} captive, NB dark enlarged beard display when

Dave Watts / Inland bearded dragon {Pogona vitticeps} Northern Territory, Australia

Martin Willis / Inland Bearded Dragon (Pogona vitticeps) in defensive posture, Bedourie, Queensland, Australia