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The data was developed from Map 1 on page 5 of Introduction to the California Condor by Snyder and Snyder, 2005. The data represents what the authors described as the "approximate range of the California Condor in about 1800". In early historical times, the authors described the California Condor as being widely distributed along the west coast of North America, from present day British Columbia in Canada to the mountains of northern Baja California in Mexico.
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Calfifornia condor occurrence data, downloaded from USGS BISON. The USGS Biodiversity Information Serving Our Nation (BISON) project is an online mapping information system consisting of a large collection of species occurrence datasets (e.g., plants and animals) found in the United States, with relevant geospatial layers. Species occurrences are records of organisms at a particular time and location that are often collected as part of biological field studies and taxonomic collections. These data serve as a foundation for biodiversity and conservation research. BISON supports several data interchange formats to enable developers to write custom applications (http://bison.usgs.ornl.gov/services.html). The BISON...
Species reintroduction programmes, in prioritizing areas for reintroductions, have traditionally used tools that include measures of habitat suitability and evaluations of area requirements for viable populations. Here we add two tools to this approach: evaluation of ecological requirements of species and evaluation of future suitability for species facing changing climates. We demonstrate this approach with two species for which reintroduction programmes are in the planning stages in Mexico: California condor Gymnogyps californianus and Mexican wolf Canis lupus baileyi. For the condor, we identify three areas clustered in the Sierra San Pedro Martir, Baja California; for the wolf, we identify a string of suitable...
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This dataset depicts areas designated as condor habitat.
The Commission on Environmental Cooperation, in concert with a trinational group of experts, has identified North American species of common conservation concern (SCCC). These terrestrial and marine species comprise a group of important migratory, transboundary and endemic species selected from among the continent’s great wealth of wild flora and fauna, which require regional cooperation for their effective conservation.
A study of 72 historical and recent nests of the California Condor (Gymnogyps californianus) has revealed considerable variability in nest-site characteristics. This paper primarily summarizes the data on nest elevations and dimensions, entrance orientations, nest longevity and re-use, vulnerability of sites to natural enemies, and use of sites by other species. Although all known nests have been natural cavities, some have been little more than overhung ledges on cliffs, while others have been deep, dark caves with nest chambers completely concealed from the outside. Two sites have been cavities in giant sequoias (Sequoiadendron giganteurn). Contrary to previous assumptions, condors do modify the characteristics...
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This dataset represents current terrestrial intactness values (estimated at the 1km level) within the modeled distribution of the California Condor (Gymnogyps californianus). Terrestrial intactness is high in areas where development is low, vegetation intactness is high, and fragmentation is low. Consequently, this dataset serves as a general* indication of habitat quality within the distribution of this conservation element.Estimates of current terrestrial intactness were generated by an EEMS fuzzy logic model that integrates multiple measures of landscape development and vegetation intactness, including agriculture development (from LANDFIRE EVT v1.1), urban development (from LANDFIRE EVT v1.1 and NLCD Impervious...
Survival or extinction of an endangered species is inherently stochastic. We develop statistical methods for estimating quantities related to growth rates and extinction probabilities from time series data on the abundance of a single population. The statistical methods are based on a stochastic model of exponential growth arising from the biological theory of age or stagestructured populations. The model incorporates the socalled environmental type of stochastic fluctuations and yields a lognormal probability distribution of population abundance. Calculation of maximum likelihood estimates of the two unknown parameters in this model reduces to performing a simple linear regression. We describe techniques for rigorously...
The scientific evidence that California condors (Gymnogyps californianus) are frequently sickened and killed by lead poisoning from spent ammunition supports the conclusion that current levels of lead exposure are too high to allow reintroduced condors to develop self-sustaining populations in the wild in Arizona and, by inference, in California. The evidence for lead poisoning and its source comes from the following sorts of data: 1) 18 clinical necropsies revealing high levels of lead in body tissues and (or) presence of lead shotgun pellets and bullet fragments in digestive tracts; 2) moribund condors showing crop paralysis and impending starvation with toxic levels of lead in their blood; 3) widespread lead...
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DRECP draft species model for California Condor. This dataset was created by buffering known condor locations from 2011-2013 by 20 km and clipping this output to the DRECP 12km buffer dataset.Telemetry data was provided by Laura Mendenhall and Matthew Johnson via the U.S. Fish and Wildlife Service. These data should be used only illustrate where condors are known to have visited, and not to illustrate where condors do not exist. Note, more detailed information on condor modeling is being carried out by the California Condor Wind Energy Work Group.
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Interim 2007 range of the CA Condor in California. This dataset was published in the 5 year review of the California Condor, published in 2012.


    map background search result map search result map California Condor - Habitat Intactness, DRECP California Condor - Species Distribution Model, DRECP California (USA) Condor Habitat Historic Range of the California Condor, circa 1800 California Condor Range - USFWS California (USA) Condor Habitat California Condor - Habitat Intactness, DRECP California Condor - Species Distribution Model, DRECP California Condor Range - USFWS Historic Range of the California Condor, circa 1800