Another fascinating fact from the paper: it appears that the Gulf of Alaska transients do in fact mingle with West Coast transients. They were seen swimming together in Glacier Bay in 2001. It is not yet known if they interbreed.
During the cold winters, the Alaskan Wood Frog becomes a frog shaped block of ice. It stops breathing, and its heart stops beating. When Spring arrives the frog thaws and returns to normal going along its merry way