Eleutherodactylus cooki
Puerto Rican Cave Frog, Coquí Guajón
Subgenus: Eleutherodactylus
family: Eleutherodactylidae
subfamily: Eleutherodactylinae

© 2004 Luis J. Villanueva-Rivera (1 of 1)
Conservation Status (definitions)
IUCN (Red List) Status Vulnerable (VU)
Other International Status None
National Status None
Regional Status None



View distribution map in BerkeleyMapper.

E. cooki is a medium sized species, averaging 37mm. The color is brown and the males have a yellow patch in the throat. The eyes and the digital disks are large compared with other Eleutherodactylus (Rivero 1998) .

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Puerto Rico


View distribution map in BerkeleyMapper.
This species is limited to southeast Puerto Rico. It inhabits caves that are formed in the spaces between large granite boulders and some rivers with rocky shores. (Rivero, 1998; Vega-Castillo, 2000).

Life History, Abundance, Activity, and Special Behaviors
The male guards the egg clutches of an average size of 17 eggs. Up to four clutches from different females are guarded together, evident by the development stage of the eggs. (Burrowes, 2000).

Trends and Threats
Stable populations have been found and one study found high genetic variabilty, possibly due to movement of individuals between populations (Vega-Castillo, 2000; Burrowes & Joglar, 1999). Urban developments and road constructions could threat the limited habitat of this species.


Burrowes, P. A. (2000). ''Parental care and sexual selection in the Puerto Rican cave-dwelling frog, Eleutherodactylus cooki.'' Herpetologica, 56, 375-386.

Burrowes, P. A. and Joglar, R. J. (1999). ''Population genetics of the Puerto Rican cave-dwelling frog, Eleutherodactylus cooki.'' Journal of Herpetology, 33, 706-711.

Rivero, J.A. (1998). Los Anfibios y Reptiles de Puerto Rico. University of Puerto Rico Press

Vega-Castillo, S. I. (2000). Habitat description and comparison of the Puerto Rican Demon or Guajón, (Eleutherodactylus cooki) at two localities in the eastern part of Puerto Rico, Unpublished Masters Thesis. University of Puerto Rico, Mayaguez Campus.

Written by Luis J. Villanueva-Rivera (ljvillanueva AT, University of Puerto Rico, Río Piedras
First submitted 2005-02-28
Edited by Tate Tunstall (2008-02-03)

Species Account Citation: AmphibiaWeb 2008 Eleutherodactylus cooki: Puerto Rican Cave Frog <> University of California, Berkeley, CA, USA. Accessed Oct 24, 2020.

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Citation: AmphibiaWeb. 2020. <> University of California, Berkeley, CA, USA. Accessed 24 Oct 2020.

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