New strains of the Ranavirus have been found in northern Spain and they are jumping species, killing frogs, toads and newts, according to BBC News. The virus can cause skin ulcers and intestinal bleeding.

Stephen Price, lead author of the study published in Current Biology, said, "Until the outbreaks, we didn't really know about this lineage of virus. But since these die-offs began, we've started to see them elsewhere - in China in giant salamanders."

According to the International Union for Conservation of Nature, "More than half of all European amphibians (59 percent) and 42 percent of reptiles are in decline, which means that amphibians and reptiles are even more at risk than European mammals and birds."

"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," Price said, according to BBC News. "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."

Price even noted that snakes that fed on amphibians that had the CMTV-like Ranaviruses ended up showing signs of the virus.