A donation of 200 Tracer microchips by Bayer is helping to save one of the world's largest and rarest species of frog against extinction. A deadly fungal disease, responsible for decimating global amphibian populations, is threatening the last known wild population of the 'mountain chicken' frog (Leptodactylus fallax).

The eastern Caribbean island of Montserrat is the last global stronghold for this species - known locally as mountain chicken due to its taste. As recently as 2002, chytridomycosis wiped out the majority of mountain chicken frogs on the island of Dominica. Recent tests on dead frogs found in the west of Montserrat have confirmed the presence of this disease.

The Durrell Wildlife Conservation Trust has been working in Montserrat since the early 1990s to support the local government in the protection of the island's vast biodiversity. The mountain chicken has been an important species, and Durrell holds the largest safety net population at its Jersey headquarters.

In response to the positive identification of the disease, Durrell has launched an emergency plan to rescue healthy frogs and put in place longer treatment and management plans for the protection of the species.

Bayer's donation of 200 Tracer microchips will be used to individually identify the captive mountain chickens held by Durrell to help manage a breeding programme. Durrell is also testing the feasibility of treating the frogs with antifungals in their natural habitat, and the use of the donation of microchips will be essential to allow individual frogs to be monitored to assess the outcomes of treatment regimes.

Durrell's head of veterinary services, Javier López, has worked with mountain chickens for a number of years, and explains that the disease could very quickly wipe out the species. Captive populations of healthy frogs, such as the one in Jersey, could be used to initiate re-introductions back to the wild or in disease-free areas.

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