Laojunshan slow frogs are considered “small,” reaching about 1.4 inches in size, researchers said. They have “robust” limbs, “oval” tongues and “rough” skin. Photos show the multicolored Laojunshan slow frog. The frog’s back is chestnut brown with dark brown-black splotches. Underneath, its belly is creamy white with “yolk-yellow” groin and armpits, the study said.