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A sweet singing frog, called Gracixalus quangi. While most male frogs attract females with repetitive croaks, Quang’s tree frog spins a new tune each time. No two calls are the same, and each individual mixes clicks, whistles and chirps in a unique order. It was discovered in the high-altitude forests of northern Vietnam

Photograph: Jodi J. L. Rowley/Australian Museum/WWF (via Singing frog and ‘walking’ catfish among 126 new species discovered in Mekong basin – in pictures | Environment | guardian.co.uk)

A sweet singing frog, called Gracixalus quangi. While most male frogs attract females with repetitive croaks, Quang’s tree frog spins a new tune each time. No two calls are the same, and each individual mixes clicks, whistles and chirps in a unique order. It was discovered in the high-altitude forests of northern Vietnam

Photograph: Jodi J. L. Rowley/Australian Museum/WWF (via Singing frog and ‘walking’ catfish among 126 new species discovered in Mekong basin – in pictures | Environment | guardian.co.uk)