The call of American bullfrogs was deafening when scientists from the University of California, Davis, first began researching the impact of invasive bullfrogs on native northwestern pond turtles at Yosemite National Park.
“At night, you could look out over the pond and see a constellation of eyes blinking back at you,” said UC Davis Ph.D. candidate Sidney Woodruff, lead author of a study chronicling the effects of removal. “Their honking noise is iconic, and it drowns out native species’ calls.”