Scientists at Chester Zoo have developed a method of tagging one of the world's smallest and most endangered amphibians - the golden mantella frog.
The researchers are injecting frogs at the zoo with a minuscule amount of fluorescent silicon, giving the animals a coloured fluorescent stripe that will make them easier to monitor in the wild.
The team is now going to Madagascar to work with a partner organisation Madagasikara Voakajy. They plan to tag and track the tiny amphibians in order to work out the areas of forest that should be protected in order to conserve them.
Here, the project leader Dr Gerardo Garcia explains how and why he is hoping to make these critically endangered frogs glow.
Video journalist: Victoria Gill
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