Dr Price said: "In the Picos de Europa National Park, we've seen major population collapses in three species: the common midwife toad, the common toad and the alpine newt. But we also found all the common amphibian species in the park were highly susceptible and experiencing disease and mortality.
"It is a pretty graphic disease with a high kill-rate. We've shown these viruses have caused simultaneous declines in several species of host."