Nick Garbutt / Bornean angle-headed lizard (Gonocephalus bornensis) with mouth open in forest habitat, Danum Valley, Sabah, Borneo, Malaysia

Adrian Davies / Borneo angle headed / Long crested forest dragon (Gonocephalus bornensis) Danum Valley, Sabah, Borneo.

Adrian Davies / Borneo angle headed / long crested forest dragon (Gonocephalus bornensis) Danum Valley, Sabah, Borneo.

Adrian Davies / Borneo angle headed / Long crested forest dragon (Gonocephalus bornensis) Danum Valley, Sabah, Borneo.

Alex Hyde / Bornean angle-headed lizard / Long-crested forest dragon (Gonocephalus bornensis) juvenile climbing liana vine in tropical rainforest. Danum Valley, Sabah, Borneo.

Chien Lee / Borneo Anglehead Lizard (Gonocephalus bornensis) at night, Gunung Penrissen, Borneo, Malaysia

Chris Mattison / Borneo Dragon (Gonocephalus borneensis). Danum Valley, Sabah, Borneo.

Sebastian Kennerknecht / Borneo Anglehead Lizard (Gonocephalus bornensis) male on tree, Tawau Hills Park, Sabah, Borneo, Malaysia

Suzi Eszterhas / Borneo Anglehead Lizard (Gonocephalus bornensis), Danum Valley Conservation Area, Malaysia

Christian Ziegler / Borneo Anglehead Lizard (Gonocephalus bornensis) in defensive posture, Lambir Hills National Park, Sarawak, Malaysia

Christian Ziegler / Borneo Anglehead Lizard (Gonocephalus bornensis), Lambir Hills National Park, Sarawak, Malaysia

Chien Lee / Borneo Anglehead Lizard (Gonocephalus bornensis), Danum Valley Conservation Area, Sabah, Borneo, Malaysia