ROOSEVELT, Utah — Utah wildlife officials are alarmed over the presence of American bullfrogs. Acting on a tip from a golfer, biologists confirmed the frogs were in a pond at Roosevelt Golf Course.

A "constellation of eyes" welcomed Sidney Woodruff the first time she went nighttime frog spotting at Yosemite National Park. Her headlamp lit up thousands of eyes that belonged to the invasive ...

American bullfrog populations have exploded around the world with dire consequences for native wildlife. But researchers say they may have found a way to help these species rebound. American bullfrogs ...

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Sidney Woodruff of UC Davis holds a northwestern pond turtle at a field site in Yosemite. (Courtesy Sidney Woodruff) The call of American bullfrogs was deafening when scientists from the University of ...