What does a white-lipped froglet sound like?

The white-lipped frog is a terrestrial (living on the ground) smooth-bodied frog (not warty like a toad) which passes through a tadpole stage. The tadpoles are brown colored, reaching about 1.5 inches (13 millimeters) in length. L. albilabris can be recognized by its white upper lip (hence the name albilabris), webless fingers and toes, black streak between the eyes and the tip of the snout and between eye and shoulder. In general, adults grow to 1.4 inches (3.5 centimeters) in snout-vent length, but like other Puerto Rican frogs the body size increases with elevation and adults of a snout-vent length greater than 2.0 inches (5.0 centimeters) are not rare in the higher regions of the El Yunque National Forest. Individuals have a grayish brown background color with dorsal lines and bands of various shades of brown, cream, and reddish brown. It is white ventrally, and some males have many dark spots on the throat. Its voice is a "pink-pink-pink" sound usually heard from a muddy area.