Amphibians disappear from Yellowstone Park
A find such as this is always a warning of danger, because frogs and salamanders react so strongly to climate change, that is really means something is happening in the atmosphere, so scientists are worried many of these could become extinct.
"I was always of two minds when I kept coming with these results. It's exciting because it's going to be a paper with a large impact. But on the other hand this, this is frightening," said McMenamin.
Sarah spent three summers in Yellowstone Park studying common frogs and a species of salamander. She compared their numbers with a study done in the early 1990's and found significant declines in the amounts of water, hatching eggs and populations.
These are all a direct result, not of short-term weather, but long-term climate change.