2002 Wildlife Facts: Hedrick's Coqui

Photo of Hedrick's Coqui, Coqu�� de Hedrick

Hedrick's Coqui (Eng.), Eleutherodactylus hedricki (sci.) Information compiled by Víctor M. Cuevas, Biological Scientist , EYNF/LEF

Photo from:  The Amphibians and Reptiles of Puerto Rico, Rivero 1998

General Notes

16 species of tree frogs from the genus Eleutherodactylus are described from the Island of Puerto Rico, 13 of them are known to occur in the EYNF.

E. hedricki was discovered in 1962, when finding a new species of frog seemed very improbable.  Named in honor of Hedrick J. Rivero at age 9, who declared himself assistant to his father and followed him through creeks, caves and mountains during any time of the day or night.


Distinctive features are the pronounced constriction in the back of the head (as if the waist were in the back of the head), a shallow furrow along the middle of the back from between the eyes to near the sacral hump, and the short rounded snout. Other distinguishing but not necessarily exclusive characteristics are: the small eyes, with narrow upper eyelids, the uniformerly granular dorsum, the pair of light, externally concave lines on the back (not too distinct in very dark animals), the blackish throat of males, and the absence of dark streaks along the sides of the snout. The basic dorsal color may be brown or dark gray, almost uniform or with obscure variegation or vermiculations of lighter gray. The males averages 32.8 mm in size, while females averages 34.6.

Natural History

The Tree Hole Coqui is one of the mountain species. It is an arboreal species that rest in and calls from holes and crevices in tree trunks and branches, often as high 20 or 30 ft. from ground.


The voice of E. hedricki is a resonant "ping, ping, ping".  The species may be heard during the day time but by midnight most of the callers have become silent.  The voice has not been heard below about 1,000 ft.

CLICK HERE to hear the voice of this tree frog.


Lower elevation forests in the Luquillo Mountains (El Yunque), Cayey Mountain Range and Central Mountain Range.

Look for it in the EYNF:
Lower sections of Tradewinds trail, Big Tree Trail.

Additional Information:
Rivero, Juan A.  1998.  The Amphibians and Reptiles of Puerto Rico. 2. ed. rev.  Editorial de la Universidad de Puerto Rico

Joglar, Rafael L.  1998.  Los Coqus de Puerto Rico:  Su Historia Natural y Conservaci.  Editorial de la Universidad de Puerto Rico

USDA Forest Service
HC-01 Box 13490
Rio Grande, PR 00745-9625

List of Mamals by Month

January February March April
Photo of Elfin Woods Warbler, Reinita de Bosque Enano
Photo of a Bat, Murci lago
Photo of Hedrick's Coqui, Coqui de Hedrick
Photo of Velvet Worm, Peripatus
May June July August
Photo of PR Tody, San Pedrito
Photo of Giant Anole, Lagarto Verde
Photo of PR Lizard Cuckoo, Pjaro Bobo Mayor
Photo of Small Indian Mongoose, Mangosta
September October November December
Photo of Walking Stick, Palito Viviente
Photo of Freshwater Crab, Buruquena
Photo of PR Boa, Boa de PR
Photo of American Eel, Anguila de Rio