Rio Grande leopard frog

Rio Grande leopard frog

Conservation status
Least Concern (IUCN 3.1)^[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Amphibia
Order:	Anurra
Family:	Ranidae
Genus:	Rana
Species:	R. berlandieri
Binomial name
*Rana berlandieri* Baird, 1859
Synonyms
Rana berlandieri Rana halecina berlandieri Rana halecina austricola Rana virescens austricola Rana austricola Rana pipiens berlandieri Rana pipiens austricola Lithobates berlandieri

The Rio Grande leopard frog (Rana berlandieri)^[2] is a species of aquatic frog native to the southern United States in Texas and New Mexico, and south through Mexico and Central America.^[1] It is also sometimes referred to as the Mexican leopard frog. The epithet berlandieri is in honor of the Belgian naturalist Jean Louis Berlandier, who worked for the Mexican government on one of the first biological surveys of Texas.^[3]

Physical description

The Rio Grande leopard frogs grow from 2.2 to 4.5 inches in length. They are usually tan, brown, or pale green in color, with distinctive black spotting with prominent light-colored ridges down either side of their backs. Their noses are angular, and they have long, powerful legs with webbed feet.

Ecology and behavior

The species is primarily aquatic, and mostly nocturnal, though they can be often found during the day resting along the edge of the water. Despite their geographic range being mostly arid or semiarid, they inhabit permanent water sources, such as streams, creeks, and ponds. They are insectivorous, but like most frogs, will eat almost anything they can overpower and swallow. Mating occurs during the rainy periods of the spring and fall. The males make a rattling call which is loud enough to be heard a quarter mile or more away. Eggs are laid in large masses attached to aquatic vegetation.

Taxonomy

The Rio Grande leopard frog was once considered a subspecies of the northern leopard frog (Rana pipiens) but was later recognized as a distinct species due to morphological differences. Recent research has placed Rio Grande leopard frogs in the subgenus Pantherana.^[2]^[4]

Geographic range and status

Found from Central Texas to New Mexico (where it is listed as vulnerable), south to Mexico through the Yucatán Peninsula, Belize, Guatemala, and Honduras to northeastern Nicaragua,^[1] its presence uncertain in El Salvador.^[1]

It is easily confused with other species that share its range, such as the Plains leopard frog (Rana blairi). It is unknown whether hybridization occurs. The species has also been introduced to the Colorado River in California and Arizona, and is known to be expanding its range south into Mexico in the state of Baja California. It is believed to be contributing to the population reduction of the lowland leopard frog (Rana yavapaiensis) which is native to the region. This expansion of range is the primary factor in the Rio Grande leopard frog being classified as least concern, by the IUCN Red List.

References

1 2 3 4 Georgina Santos-Barrera, Geoffrey Hammerson, Gunther Köhler, Larry David Wilson, Julian Lee, Rogelio Cedeño Vázquez (2010). "Lithobates berlandieri". IUCN Red List of Threatened Species. Version 2011.2. International Union for Conservation of Nature. Retrieved 1 May 2012.
1 2 David M. Hillis (2007). "Constraints in naming parts of the Tree of Life" (PDF). Molecular Phylogenetics and Evolution 42 (2): 331–338. doi:10.1016/j.ympev.2006.08.001. PMID 16997582.
↑ Biographies of People Honored in the Names of the Reptiles and Amphibians of North America. Ebeltz.net. Retrieved on 2013-01-02.
↑ David M. Hillis & Thomas P. Wilcox (2005). "Phylogeny of the New World true frogs (Rana)" (PDF). Molecular Phylogenetics and Evolution 34 (2): 299–314. doi:10.1016/j.ympev.2004.10.007. PMID 15619443.

External links

Museum.utep photo: Rana berlandieri

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