Sunlight filtered through the trees of a rainforest in northern Peru and illuminated an “iridescent” creature. Its “golden” eyes scanned the surroundings — but it wasn’t the only one looking. Passing ...

Male frogs typically have “yolk yellow” bellies, while females have cream bellies. However, the new species can change color from day to night and in different habitats, researchers said.

The belly and gular region (or throat) are cream-colored with very light gray vermicular spots.” There is some variation between frogs of the new species, researchers said. Some of the frogs ...