File Geodatabase Feature Class
Tags
incidental, Mariposa County, sample, Great Gray Owl, meadows, distribution, regulatory, special species, bird, biota, environment, territories, California, forest, inventory, breeding, Tuolumne County, Strix nebulosa, sites, abundance, Sierra Nevada, observations
The database was designed to track the location and occupation history of each known great gray owl observation, breeding site, or consistently used site in California which is likely to be unique from other such observations and sites. The database was designed to be used for project review where site-specific information and history of occupation could be evaluated to determine how a specific project might impact the owls and to design project modification to avoid conflicts. The database supports research by tracking the known distribution and occupancy pattern and trends of this species. The database also tracks the known distribution of this species.
The Great Gray Owl Database represents known Great Gray Owl reproductive sites, multiple-occurrence sites and observations throughout California. The Database contains 758 observation records representing 201 great gray owl sites, with most coming from Tuolumne, Mariposa, Madera and Fresno counties. Most data were gathered from 1972 to the present time, but they also include numerous early sightings compiled from the literature and research in the early 1970's. Observations have been made by researchers and biologists working for the US Forest Service and National Park Service, ornithologists, and birders, biologists surveying for spotted owls, and biologists and researchers specifically surveying for great gray owls. Early observations were gathered mostly by observing owls and many were chance observations. Some surveys included searches for feathers and listening for great gray owl calls. In the last 15 years methods have been developed to call great gray owls with tape players. The most recent surveys used a mixture of these techniques and are following US Forest Service survey protocols described by Beck and Winter, in "Survey Protocol for the Great Gray Owl in the Sierra Nevada of California" (US Forest Service, 5/2000). Compiled sources are used almost verbatim in the database. They include historical information and observations made by Jon Winter in the late 1970's, survey and monitoring data from the Stanislaus National Forest, and research reports from the National Park Service and The Institute for Bird Populations. Other single and small groups of observations have been compiled and entered by DFG biologists.
There are no credits for this item.
Contact contributor for permission to use data. Must recognize that dataset was created and provided by the California Department of Fish and Wildlife.
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
Extent
| West | -124.154463 | East | -118.056638 |
| North | 41.973269 | South | 35.787142 |
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
Contact contributor for permission to use data. Must recognize that dataset was created and provided by the California Department of Fish and Wildlife.
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.