Hal Cogger has provided photos for the following 6 species

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Scientific name	Common name	Genus	Family	Broad distribution
Cyrtodactylus sadleiri	Giant gecko	Cyrtodactylus	Gekkonidae	Christmas Island
Lepidodactylus listeri	Christmas Island gecko	Lepidodactylus	Gekkonidae	Christmas Island
Cryptoblepharus egeriae	Blue-tailed snake-eyed skink	Cryptoblepharus	Scincidae	Christmas Island
Emoia nativitatis	Christmas Island whiptail-skink	Emoia	Scincidae	Christmas Island
Lygosoma bowringii	Christmas Island grass-skink	Lygosoma	Scincidae	Christmas Island
Lycodon capucinus	Common wolf snake	Lycodon	Colubridae	Christmas Island