Several Nidirana shyhhuangi, or Yuchi music frogs. Photos from Chun-Fu Lin and Chunwen ... mud nests” then “call from inside the nest to attract females,” researchers said.

This story appears in the March 2017 issue of National Geographic magazine. These frogs put the “group” in “group sex”—and that helps them thrive. Of all vertebrates, gray foam-nest tree ...

The coloring of the new species varies from brown to “yellowish-brown” to gray, researchers said and photos ... inside the nest to attract females,” researchers said. Female frogs lay ...