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Shasta Salamanders Survey Results for the Shasta-Trinity National Forest, 2019-2020


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Halstead, B.J., and Kleeman, P.M., 2020, Shasta salamanders surveys for the Shasta-Trinity National Forest (ver. 2.0, July 2020): U.S. Geological Survey data release,


These data are the results of surveys for the Shasta salamander complex (Hydromantes shastae, H. samweli, and H. wintu) conducted at 87 survey plots on the Shasta-Trinity National Forest from April 2019 to March 2020. Time- and area-constrained occupancy surveys were conducted at plots selected within high-priority areas identified by the U.S. Fish and Wildlife Service. There are additional surveys planned for future field seasons. As the Shasta Salamander is under review for listing under the Endangered Species Act, sensitive location information is restricted, and can be made available upon request by contacting the dataset point of contact.

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Point of Contact :
Brian J Halstead
Originator :
Patrick M Kleeman, Brian J Halstead
Metadata Contact :
Brian J Halstead
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Western Ecological Research Center
USGS Mission Area :

Attached Files

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Hydromantes_GridCell_2019-20_FirstEncounter.csv 3.68 KB text/csv
Hydromantes_GridCell_2019-20_Snails.csv 2.01 KB text/csv
Hydromantes_GridCell_2019-20_SpeciesCounts.csv 12.88 KB text/csv
Hydromantes_GridCell_2019-20_SurveyPlotInformation.csv 73.78 KB text/csv
Hydromantes_GridCell_2019-20_SurveyTimer.csv 10.06 KB text/csv


The purpose of this project was to increase survey effort in select areas designated by the U.S. Fish and Wildlife Service to increase information about the range and probability of occurrence of Shasta salamanders. In particular, we sought to: 1) Develop and implement a systematic survey protocol for Shasta salamanders. 2) Survey for Shasta salamanders in areas deemed high priority by the U.S. Fish and Wildlife Service (USFWS). 3) Estimate Shasta salamander probability of occurrence and detection probabilities under the protocol, and propose modifications to the protocol that will increase detection probabilities and survey repeatability. This information is required to inform U.S. Fish & Wildlife Service management activities; both to assess the potential effects of increasing the level of Shasta Lake on Shasta salamanders and to evaluate whether the species complex should be listed under the U.S. Endangered Species Act.


The authors of these data require that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.



  • USGS Western Ecological Research Center



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Additional Information


Type Scheme Key
DOI doi:10.5066/P9VKZMBN
USGS_ScienceCenter Western Ecological Research Center
USGS_MissionArea Ecosystems
USGS_keywords Wildlife Biology

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