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Texas Invasive Species Institute

Texas Invasive Species Institute

Cuban Treefrog

Osteopilus septentrionalis

Class: Amphibia
Order: Anura
Family: Hylidae

Osteopilus septentrionalis

Photographer: Joseph Scopino Source: Bugwood.org

Description

The Cuban treefrog is the largest tree frog in the United States. The back is warty like a toad but have very large eyes. Color varies from gray to gray-green or tan-brown or even cream-colored, and individuals are able to change color rapidly. The body is usually heavily mottled and there are often strips on the hind legs. Most adults from Florida are 1-4 inches long even though females may grow to 6 inches or more.

Cuban treefrogs secrete a sticky substance that can irritate the skin and mucus membranes of people. The burning and itching sensation that last for an hour or more. Wash your hands after handling one.

Want to hear its call? Click here

Ecological Threat

 Being the largest treefrog in the United States makes it able to out-compete native treefrog species. Studies have shown these frogs to replace green and squirrel frogs in residential areas. They not only replace the native species the Cuban treefrogs eat the native frog species. They also have been observed to impact species of small birds because they invade the bird’s nest boxes and frighten them away. They have even been known to eat small lizards and snakes. Also, since they have the skin secretions that irritate human skin they are an unwelcomed pest in the Unites States.

Biology

Breeding season in Florida is from May to October and usually stimulated by warm summer rains. Breeding events usually last one night. Eggs are deposited as a thin floating sheet in warm quiet waters of just about any size that lack predatory fish. Tadpoles hatch two days later and become frog-lets 3 to 8 weeks later. Mature males may only live two months, whereas mature females may survive more than two years.

History

Cuban treefrogs were found in Key West, Florida in 1928. Most likely they arrived on shipping crated from the Caribbean. By the mid-1950a, they had spread through the Florida Keys. The first specimen caught on mainland Florida was in 1951.  It is expected that they will continue to spread along the Gulf coast and down south into Mexico. The spread of the Cuban treefrog has also been facilitated by the pet trade.

Native Origin

Cuba, the Bahamas and the Cayman Islands

Current Location

U.S. Habitat: Natural and man-made habitats. In Florida, they can be found in swamps as well as pine forests. In residential areas, they are most frequently seen near ornamental ponds and outside lighting fixtures where they wait to catch insects.

Distribution

U.S. Present: FL and GA; but has been found in CO, IN. MD, and VA

Management

Since this tree frog is popular within the pet community, management of this frog in Florida or Georgia is nearly impossible. What can be done on a personal level is to not ever buy any exotic animals and “release them into the wild”. As you can see with this treefrog and other animals (like the pythons in Florida); releasing them only wreaks havoc on the native animals. So be sure you can handle and animal for about 10 years at least because animals live much longer in captivity. Recommended by the University of Florida Extension Service, these treefrogs can be caught by hand (with gloves) and euthanized humanely. However, you HAVE TO BE 100% positive it is a Cuban tree frog; and should probably send the specimen off to a local state entity. Humane ways can be found at this website: http://www.floridagardener.com/critters/CubanTreeFrog.htm

References

Text References

Forys, E. A., & Allen, C. R. 1999. Biological invasions and deletions: community change in south Florida. Biological Conservation, 87(3):341-347.

McGarrity, M. E., & Johnson, S. A. 2009. Geographic trend in sexual size dimorphism and body size of Osteopilus septentrionalis (Cuban treefrog): implications for invasion of the southeastern United States. Biological Invasions, 11(6):1411-1420.

Salinas, F. V. 2006. Breeding behavior and colonization success of the Cuban treefrog Osteopilus septentrionalis. Journal Information, 62(4).

Smith, K. G. 2005. Effects of nonindigenous tadpoles on native tadpoles in Florida: evidence of competition. Biological Conservation, 123(4):433-441.

Wyatt, J. L., & Forys, E. A. 2004. Conservation implications of predation by Cuban treefrogs (Osteopilus septentrionalis) on native hylids in Florida. Southeaster

Woodward, Susan L., and Joyce Ann. Quinn. 2011. Cuban Treefrog. Encyclopedia of Invasive Species: From Africanized Honey Bees to Zebra Mussels. Santa Barbara, CA: Greenwood, 211-13. Print. 

Internet Sources

http://suite101.com/article/cuban-tree-frogs-a68129

http://frogworld.net/cuban-tree-frog/

http://ufwildlife.ifas.ufl.edu/frogs/cubantreefrog.shtml

http://edis.ifas.ufl.edu/uw259

http://www.solutionsforyourlife.ufl.edu/hot_topics/environment/cuban_treefrogs.html

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