Yosemite’s ponds used to echo with the booming calls of invasive bullfrogs, which devoured young turtles, newts, birds, and more. Now, with bullfrogs nearly gone, native sounds are returning—and so ...

Painted turtles sunning themselves in a pond. Why are sea turtles endangered? Discover the human impact on North American turtles and learn about the steps we can take to help. When I was young, my ...

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 ...