Endangered Siamese crocodile numbers increasing thanks to breeding program

One of the rarest reptiles in the world has been brought back from the brink of extinction - thanks to a conservation program that is marking a milestone of 25 years.

The work to save the critically endangered Siamese crocodile is also inspiring conservationists overseas, including in Australia.

Conservation biologist Pablo Sinovas is releasing a juvenile Siamese crocodile into the wild in Cambodia's Cardamom Mountains.

The area is home to what's thought to be the world's largest remaining population of Siamese crocodiles, roughly 250 adults.