DesignPicsInc/Alamy When some frogs lose too much water they also lose their ability to jump – more evidence of the problems they face with climate change. Dan Greenberg at Simon Fraser University in Burnaby, Canada, and his colleague Wendy Palen experimented with three species: the coastal tailed frog ( Ascaphus truei), which lives near cold mountain streams, the desert-adapted great basin spadefoot toad ( Spea intermontana) and the Pacific tree frog ( Pseudacris regilla), which can adjust to various habitats. Advertisement The researchers measured the animals’ jumping distances after placing them in environmental chambers to control their body temperature and dehydration levels. They found that the more dehydrated the amphibians were, the shorter the distance they could cover in one jump. Once dehydration had led the frogs to lose 30 per cent of their body weight – 45 per cent for the toad – they stopped jumping entirely.