Jersey's Agile frog population has been described as tiny, despite a programme to breed them in captivity.
The Agile frog can only be found at one habitat in Jersey
Last year, the island's Agile frog Group decided the only way to halt any decline was to collect spawn and hatch tadpoles in a controlled environment.
The frogs are then introduced into the wild. Jersey is the only place in the British Isles where they are found.
But it is thought the population is only about 200 to 300 animals, which Jon Pinel of the group called "tiny".
The group, which uses the Frances le Sueur Centre and the zoo for its breeding programme, wants to expand it. The problem is that it is expensive and it is considering looking for sponsorship for the programme.
Thirty years ago, the Agile frog lived in at least seven different sites in the British Isles, but by 2004 the frogs were only found at one habitat in Jersey.
The Agile frog can perform a two-metre standing jump, thanks to its long back legs.
Its colouring ranges from green to light brown and it has a black strip across its eyes.
The frogs are vulnerable to poor water quality, feral cats and housing developments.