NPSpecies

The last documented and verified observation of northern leopard frogs in GRCA occurred in 2014 at Robbers Roost spring on the north rim.

Data Source: Persons and Nowak 2005

Lithobates pipiens (Northern Leopard Frog) was considered a common species of Arizona in a status report created by the Colorado River Wildlife Council in 1982. An account published by the Grand Canyon Natural History Association (now Grand Canyon Conservancy) in 1982 indicates the species as rare to the Grand Canyon area, with reports from Cardenas Marsh, river mile 71. Observations of northern leopard frogs have also been reported Ribbon Falls (Bright Angel Creek system). As of 2003, the population abundance was identified as uncertain within the park and in 2006 AZGFD noted the absence of Northern Leopard Frog populations from their historic ranges in Arizona. In 2014, a single northern leopard frog was documented and verified at Robbers Roost on the north rim of GRCA. Photos archived. No observations have been documented since 2014. Park Species Data Source: Persons and Nowak 2005 Checklist of the Wildlife of the Grand Canyon: Birds, Mammals, Fish, Amphibians, and Reptiles. Grand Canyon, AZ: Grand Canyon Association, 2003. Print. Brennan, Thomas C., and Andrew T. Holycross. A Field Guide to Amphibians and Reptiles in Arizona. Phoenix, AZ: Arizona Game and Fish Dept., 2006. Print. Endemic Amphibians and Reptiles of the Colorado River System: A Status Report. Denver, CO: Colorado River Wildlife Council, 1982. Print. Miller, Donald M., Robert Young, and Thomas Gatlin. Amphibians and Reptiles of the Grand Canyon National Park. Grand Canyon, AZ: Grand Canyon Natural History Association, 1982. Print.