Robert Valentic / Banded knob-tailed gecko (Nephrurus wheeleri wheeleri) male, near Cue, Western Australia, January.

Robert Valentic / Southern knob-tailed gecko (Nephrurus w. wheeleri) male, Cue, southern central Western Australia. January.

Robert Valentic / Midline knob-tailed gecko (Nephrurus vertebralis) from Cue in the central Western Australia, January.

Doug Gimesy / Portrait of a rescued Midline knob-tailed gecko (Nephrurus vertebralis), rescued from smuggling, Captive

Jiri Lochman / Smooth Knob-tailed gecko (Nephurus levis) camouflaged among pebbles and desert sand, native to the deserts of Australia.

MYN / Lily Kumpe / Banded knob-tailed gecko (Nephrurus wheeleri), Western Australia. meetyourneighbours.net project

Chris Mattison / Thick-tailed / Barking Gecko (Nephrurus / Underwoodisaurus milii). Endemic to Australia.

Chris Mattison / Thick-tailed / Barking Gecko (Nephrurus / Underwoodisaurus milii). Endemic to Australia.

Chris Mattison / Thick-tailed / Barking Gecko (Nephrurus / Underwoodisaurus milii). Endemic to Australia.

Chris Mattison / Thick-tailed / Barking Gecko (Nephrurus / Underwoodisaurus milii). Endemic to Australia.

Chien Lee / Knob-tailed Gecko (Nephrurus levis) in defensive posture, Western Australia, Australia

Daniel Heuclin / Common Knob-tailed Gecko (Nephrurus levis levis). Controlled conditions. Australia, January.

Robert Valentic / Smooth knob-tailed gecko {Nephrurus levis occidentalis} female, Kalbarri, Western Australia

Robert Valentic / Banded knob-tailed gecko {Nephrurus wheeleri cinctus} male foraging at night, standing tall for better view, Pannawonica, Western Australia

Robert Valentic / Starred knob-tailed gecko {Nephrurus stellatus} female foraging on the sand dunes at night, Ceduna, South Australia

Robert Valentic / Rough / Prickly knob-tailed gecko {Nephrurus asper} male foraging at night, standing tall for better view, Middleton, Queensland, Australia

Robert Valentic / Banded knob-tailed gecko {Nephrurus wheeleri cinctus} Western Australia

Robert Valentic / Knob-tailed gecko, female {Nephrurus levis pilbarensis} Western Australia

Robert Valentic / Knob-tailed gecko, female {Nephrurus levis} Northern Territory, Australia

Robert Valentic / Knob-tailed gecko {Nephrurus deleani} South Australia

Robert Valentic / Knob-tailed gecko, female {Nephrurus levis occidentalis} Western Australia

Robert Valentic / Starred knob-tailed gecko {Nephrurus stellatus} male portrait, South Australia

Robert Valentic / Knob-tailed gecko {Nephrurus sheai} Kakadu NP, Northern Territory, Australia

Robert Valentic / Northern knob-tailed gecko {Nephrurus amyae} Northern Territory, Australia

Robert Valentic / Northern knob-tailed gecko {Nephrurus amyae} female, Northern Territory, Australia

Robert Valentic / Knob-tailed gecko {Nephrurus levis pilbarensis} Western Australia

Robert Valentic / Knob-tailed gecko {Nephrurus levis} male eating {Gehyra vaiegata} gecko, Australia

Robert Valentic / Knob-tailed gecko, female {Nephrurus levis} New South Wales, Australia

Robert Valentic / Knob-tailed gecko {Nephrurus levis} female feeds on stick insect, NSW, Australia

Robert Valentic / Knob-tailed gecko, male {Nephrurus levis} Northern Territory, Australia

Steven David Miller / Rough knob tailed gecko {Nephrurus asper} captive, Central Australia

Robert Valentic / Starred knob-tailed gecko {Nephrurus stellatus} South Australia.

Robert Valentic / Smooth knob-tailed gecko {Nephrurus laevissimus} Uluru NP, Australia.

Michael & Patricia Fogden / Knob-tailed Gecko (Nephrurus levis) grooming itself, licking eye with tongue, on sand dunes Shark Bay World Heritage Site, Western Australia

Michael & Patricia Fogden / Knob-tailed Gecko (Nephrurus levis) in defensive display on dunes near Shark Bay, World Heritage Site, Western Australia

Michael & Patricia Fogden / Knob-tailed Gecko (Nephrurus levis) on dunes near Shark Bay, World Heritage Site, Western Australia

Michael & Patricia Fogden / Knob-tailed Gecko (Nephrurus levis) on dunes near Shark Bay, World Heritage Site, Western Australia

Michael & Patricia Fogden / Knob-tailed Gecko (Nephrurus levis) in defensive display on dunes near Shark Bay, World Heritage Site, Western Australia

Chien Lee / Knob-tailed Gecko (Nephrurus levis) in defensive posture, Western Australia, Australia

Etienne Littlefair / RF - Smooth knob-tailed gecko (Nephrurus levis) in desert at night, portrait, Simpson Desert, central Australia. (This image may be licensed either as rights managed or royalty free.)

Bruce Thomson / Prickly knob-tailed gecko (Nephrurus asper) hunting at night, Goonderoo Nature Reserve, Queensland, Australia.

Bruce Thomson / Prickly knob-tailed gecko (Nephrurus asper) camouflaged on rocky ground at night, Goonderoo Nature Reserve, Queensland, Australia.

Etienne Littlefair / Northern knob-tailed gecko (Nephrurus sheai) in a recently burnt area near Timber Creek, Northern Territory, Australia, December.

Etienne Littlefair / Smooth knob-tailed gecko (Nephrurus levis) in dune swale, south of Alice Springs, Northern Territroy, November.

Etienne Littlefair / Pale knob-tailed gecko (Nephrurus laevissimus), Mt. Connor area, Northern Territory, Australia, May.

Etienne Littlefair / Pale knob-tailed gecko (Nephrurus laevissimus), Mt. Connor area, Northern Territory, Australia, November.

Etienne Littlefair / Prickly knob-tailed gecko (Nephrurus asper) adult, northern heathands near Archer River, north Queensland, Australia, May.

Etienne Littlefair / Centralian knob-tailed gecko (Nephrurus amyae), large adult, near Alice Springs, Northern Territory, Australia, November.

Bert Willaert / Smooth knob-tailed gecko (Nephrurus levis occidentalis) portrait. Kalbarri, Kalbarri National Park, Western Australia. October.

Bert Willaert / Smooth knob-tailed gecko (Nephrurus levis occidentalis), dorsal view. Kalbarri, Kalbarri National Park, Western Australia. October.

Bert Willaert / Smooth knob-tailed gecko (Nephrurus levis occidentalis) portrait. Kalbarri, Kalbarri National Park, Western Australia. October.

Bert Willaert / Smooth knob-tailed gecko (Nephrurus levis occidentalis) portrait. Kalbarri, Kalbarri National Park, Western Australia. October.

Bert Willaert / Smooth knob-tailed gecko (Nephrurus levis occidentalis). Kalbarri, Kalbarri National Park, Western Australia. October.