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Ordinal-occurrence states of American pikas in the northern Sierra Nevada and southern Cascade Range from surveys during 2014-2019

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 05:19 AM | Dataset Last Updated: February 25, 2025 at 12:00 AM
USGS researchers and technicians comprehensively surveyed each of 150 talus patches for evidence of American pika (Ochotona princeps) occurrence. Occurrence status at each patch was classified as either no pika evidence whatsoever, former pika occurrence, or current pika occurrence. Dataset also includes latitude and longitude, as well as mean elevation of the patch and the surveyor-estimated number of home ranges suitable for pikas, for each patch. Data were used to test whether understanding of distributional controls from nearby regions could predict occurrence status in a previously under-sampled region within the Sierra Nevada, California.

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