Red-Legged Frog Tadpoles Explore Their New Home

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Detailed Description

This video provides background on and shows the release of California red-legged frog tadpoles into a pond in San Diego County, CA on March 31, 2021. These tadpoles originated from a pond in the Sierra San Pedro Martir Mountains in Baja California, Mexico and were translocated as eggs to the USA on Feb 4, 2021 as part of a multi-national conservation team consisting of TNC, USFWS, Fauno, SDNHM, and USGS. Once the egg masses arrive at Mesa Grande, they were placed in protective cages to allow for the eggs to hatch and the tadpoles to grow to a larger size. After almost 8 weeks in the cages, the tadpoles were released from their cages into the pond. As tadpoles are difficult to detect or monitor in a large pond, the scientists plan on revisiting the site in the late summer/fall of 2021 to evaluate the success by searching for newly metamorphosed frogs. Learn more about the project.

Details

Date Taken:

Length: 00:01:28

Location Taken: San Diego County, CA, US

Video Credits

Video Assembly & Editing: Allie Weill, Outreach Coordinator, USGS Western Ecological Research Center, aweill@usgs.gov

Produced: by the USGS Western Ecological Research Center Images & video by Adam Backlin (USGS), Jessica D’Ambrosio (USFWS), and Bradford Hollingsworth (San Diego Natural History Museum)

Music: “Follow the Little Creek” by Lobo Loco, licensed under CC BY-NC-SA 4.0

Transcript

The California red-legged frog has been absent from Southern California for over 20 years
A group of scientists from the United States and Mexico are working together to bring them back
These tadpoles originated from a pond in the Sierra San Pedro Martir Mountains in Baja California, Mexico and were translocated as eggs to San Diego and Riverside Counties, USA
Once the egg masses arrived in Southern California, they were placed in protective cages to allow for the eggs to hatch and the tadpoles to grow to a larger size 
After almost 8 weeks in the cages, the tadpoles were released into the pond in early spring
Below the water, we see hundreds of tiny tadpoles swimming out of the container to explore the pond.
The scientists will revisit the site in late summer or fall to evaluate the success of the reintroduction by searching for newly metamorphosed frogs
The project is a collaboration between the Conservación de Fauna del Noroeste, San Diego Natural History Museum, The Nature Conservancy,  the U.S. Fish and Wildlife Service, and the USGS
Video produced by the USGS Western Ecological Research Center
Images and video by Adam Backlin (USGS), Jessica D'Ambrosio (USFWS), and Bradford Hollingsworth (San Diego Natural History Museum). Music: "Follow the Little Creek" by Lobo Loco, licensed under CC-BY-NC-SA 4.0