Of all the world’s amphibians, the most evolutionarily unusual and critically endangered is the Archey’s frog. The smallest of New Zealand’s four native frogs, this ‘living fossil’ hasn’t changed much in 150 million years. It didn’t evolve ears or a voice, prefers the forest floor to water, and can’t leap without landing in a bellyflop. Why are Archey’s frogs so strange, and what makes them so important?
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