Ecology of the California Red-legged Frog

Ecology of the California Red-legged Frog program image

This is our introductory workshop on the California red-legged frog.


Thursday, May 5, 2016
8:00 AM - 6:00 PM
Elkhorn Slough Reserve
Lunch will be provided

COST: $450.00
Payable by check to Elkhorn Slough Foundation
Payable by credit card (online)


Instructor Information

Mr. Greg Tatarian
Wildlife Biologist
Wildlife Research Associates

Ms. Trish Tatarian
Wildlife Research Associates


Grey Hayes
(831) 274-8700



See also: California Red Legged Frog, Habitat Restoration


Workshop Objectives:             

This was an opportunity to receive training in California Red-legged Frog (CRF) species identification, field sampling techniques, and the habitat requirements. Workshop information was designed to be useful for evaluating CRF habitats, assessing potential impacts from projects within the range of CRF, conservation planning, and for educational outreach to agricultural producers and others who are considering projects that may impact CRLF. The instructors covered only minor regulatory and permitting information in this workshop.


Workshop Details:

Workshop registration included a classroom session and afternoon field component on May 5.  Registration also included attendance a night-time field training session.  Night training was conducted from 8:00 pm until midnight.  Field sessions were at Elkhorn Ranch and Native Plant Nursery: many thanks to the Ranch managers for welcoming us onto their land!


Workshop Format


May 5 Classroom Session (8:00am-2:00pm) - An overview of the biology and management of the California red-legged frog. Held at the Elkhorn Slough National Estuarine Research Reserve.

May 5 Afternoon Session (2:00pm-6:00pm) - Field trip to Elkhorn Ranch: Habitat requirements and assessment, pond designs, equipment demonstrations, tadpole identification and survey techniques. Personal vehicles required to travel to field site and liability waiver required.

Night Field Practicum (8:00pm-midnight) - Trish and Greg demonstrated USFWS survey methodology, as well as catching, handling, sexing and measuring adult frogs. Students then practiced these methods at various ponds.

Please note: this workshop was not intended to satisfy all requirements to obtain CRF permits from the U.S. Fish and Wildlife Service. Please contact that agency for further information if obtaining a Federal permit is your goal.

Documents and Publications

Contact List
We encourage participants to download the contact list to assist with arranging a rideshare or to get in contact with someone you met at the workshop. Those interested in sharing a ride to the event are marked on the contact list.

Criteria for the Selection and Use of Light Sources and Binoculars for Visual Encounter Surveys of Adult and Sub-Adult California Red-legged Frogs (Rana draytonii)
Trish Tatarian and Gregg Tatarian
Handouts: California Red-legged Frog Workshop
PDF, 364KB
Trish Tatarian and Greg Tatarian
Elkhorn Slough Coastal Training Program
Important preparation instructions for California red-legged frog workshop participants
PDF, 114KB
Grey Hayes
Elkhorn Slough Coastal Training Program
Presentation: Ecology of the California Red-legged Frog
PDF, 3.8MB
Trish Tatarian and Greg Tatarian
Elkhorn Slough Coastal Training Program
Selected and annotated bibliography of the California red-legged frog (Rana draytonii)
DOC, 115KB
Trish Tatarian and Greg Tatarian
Elkhorn Slough Coastal Training Program
Cattle Grazing Mediates Climate Change Impacts on Ephemeral Wetlands
PDF, 193KB
Christopher R. Pyke and Jaymee Marty
Conservation Biology 19(5):1619-1625
Do a threatened native amphibian and its invasive congener differ in response to human alteration of the landscape?
PDF, 199KB
Antonia D'Amore, Valentine Hemingway, Kerstin Wasson
Biological Invasions, 12(1):145-154
Evaluation of a radio-belt for ranid frogs
PDF, 136KB
Galen Rathbun and Thomas Murphey
Herpetological Review 27(4):187-189
Invasive species shifts onto genetic resource partitioning and microhabitat use of a threatened native amphibian
PDF, 164KB
Antonia Amore, Eric Kirby, Michael McNicholas
Aquatic Conservation: Marine and Freshwater Ecosystems 19: 534-541
Managing rangelands to benefit California red-legged frogs and California tiger salamanders
PDF, 6.7MB
Ford, L.D., P.A. Van Hoorn, D.R. Rao, N.J. Scott, P.C. Trenham, and J.W. Bartolome.
Alameda Resource Conservation District
Movement patterns of California red-legged frogs in an inland California environment
PDF, 748KB
Patricia J. Tatarian
Herpetological Conservation and Biology 3(2):155-169
Overwintering Tadpoles in the California Red-legged Frog (Rana aurora draytonii)
PDF, 218KB
Gary M. Fellers, Alan E. Launer, Galen Rathbun, Steve Bobzien, Jeff Alvarez, David sterner, Richard B. Seymour, and Michael Westphal
Herpetological Review 32(3),2001
Rana draytonii dispersal
Mark Allaback, David M. Laabs, David S. Keegan, Josh D. Harwayne
Herpetological Review, 41 (2), 204-206
Rana draytonii (California red-legged frog). Behavior- dangers of drift fences
Galen Rathbun, Norman Scott, Thomas Murphey
Herpetological Review 28(2):85-86
Rana Draytonii (California Red-legged Frog). Egg Predation.
Galen Rathbun
Herpetological Review 29(3):165
Rana draytonii (California Red-Legged Frog). Predation.
PDF, 216KB
Jeff Wilcox
Herpetological Review 42(3):414-415
Rana Draytonii (California Red-legged Frog). Prey.
Marc P. Hayes, Mark R. Jennings, Galen B. Rathbun
Herpetological Review 37(4):449
Relocations of California red-legged frogs, California, USA.
PDF, 1.2MB
Dana Bland
Re-introduction News, Newsletter of the Re-introduction Specialist Group, IUCN, No. 25:12-13.
Reproductive Interference by an Invasive Species an Evolutionary Trap?
PDF, 130KB
Antonia D'Amore, Eric Kirby, Valentine Hemingway
Herpetological Conservation and Biology 4(3):325-330
Terrestrial activity and conservation of adult California red-legged frogs Rana aurora draytonii in coastal forests and grasslands
PDF, 349KB
John B. Bulger, Norman J. Scott Jr., Richard B. Seymour
Biological Conservation 110:85-95
Translocation of California red-legged frogs (Rana aurora draytonii)
PDF, 789KB
Galen Rathbun and Julie Schneider
Wildlife Society Bulletin 29(4):1300-1305
Water Temperatures in a California Red-legged breeding pond
PDF, 624KB
Galen Rathbun
Immediate Science Ecology 1: 7-11
Light Source and Binoculars for Visual Encounter Surveys of Adult California Red-legged Frogs
Trish Tatarian Greg Tatarian Norman Scott
Management Guidlines for the California Red-Legged Frog
PDF, 188KB
Drs. Galen Rathbun and Norman Scott
Elkhorn Slough Coastal Training Program
Revised Guidence on Site Assessments for California Red Legged Frog
PDF, 143KB
US Fish and Wildlife
US Fish and Wildlife
Stockpond management for the benefit of California red-legged frog
PDF, 101KB
Norman Scott Galen Rathbun Trish Tatarian


California Red-Legged Frog Sounds

EPA- Pesticide Effects Determinations for the California Red-legged Frog and other California Listed Species

Managing Rangelands for California red-legged frog and California tiger salamander

Questions and Answers

Submit a question on this subject and we'll provide an answer. grey@elkhornslough.org