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Person

Brian J Halstead

Supv. Research Wildlife Biologist

Western Ecological Research Center

Email: bhalstead@usgs.gov
Office Phone: 530-669-5076
Fax: 707-678-5039
ORCID: 0000-0002-5535-6528

Location
800 Business Park Drive
Dixon , CA 95620
US

Supervisor: Tom S Kimball
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These data describe the location (terrestrial or aquatic) and activity status (active or inactive) of giant gartersnakes (Thamnophis gigas) by individual and location.
These data represent capture mark recapture data along with associated disease status for boreal toads (Anaxyrus boreas) from Wyoming and Montana from 2004-2016 and four frog species (Rana draytonii, R. muscosa, R. pretiosa, R. sierrae) from 2001-2016.
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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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These data provide information on the relationship between California red-legged frogs and their habitat in a unique ecosystem to better conserve this threatened species while restoring habitat for rare dune plants and animals.
Mountain yellow-legged frogs (MYLF) comprise a historically abundant species complex (Sierra Nevada yellow-legged frogs, Rana sierrae, and mountain yellow-legged frogs, Rana muscosa) that occupied most high elevation aquatic habitats in the Sierra Nevada and Transverse and Peninsula ranges (Grinnell and Storer 1924, Vredenburg et al. 2005, 2007). In part because of their biphasic life cycle, MYLF are keystone species in montane food webs, and form a vital trophic link between aquatic and terrestrial ecosystems (Finlay and Vredenburg 2007). In recent decades, MYLF have declined dramatically, and are now extirpated from more than 90% of their historic range (Drost and Fellers 1996, Vredenburg et al. 2007). These declines...
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