CPW Pronghorn Shapefile Download

Updated December, 2025 CONCENTRATION AREA: That part of the overall range where densities are at least 200% greater than the surrounding area during a season other than winter. LIMITED USE AREA: An area within the overall range of pronghorn that is occasionally inhabited and/or contains a small, scattered population of antelope. MIGRATION CORRIDORS: A specific geographic area that facilitates movement between seasonal ranges and receives higher use than the surrounding landscape, relative to herd or population use, and loss of which would disrupt migration. Starting in 2023 and moving forward, Brownian bridge model of movement data, where available, will be included in this layer. This represents a change in the methodology from how these data had previously been generated. MIGRATION PATTERNS: A subjective indication of the general direction of the seasonal movements of pronghorn. OVERALL RANGE: The area which encompasses all known seasonal activity areas within the observed range of a population of pronghorn antelope. PERENNIAL WATER: Sources of water known to be important to antelope survival in late summer or other drought periods. A four-mile radius should be described around a point source and four-mile band be drawn along a river or stream, which is then clipped to the Overall Range. RESIDENT POPULATION: An area that provides year round range for a population of pronghorns. The resident animals use all of the area all year long; it cannot be subdivided into seasonal ranges. A resident population may be found within the overall range of a larger, migratory population. SEVERE WINTER: That part of the winter range where 90% of the individuals are located when the annual snowpack is at its maximum and/or temperatures are at a minimum in the two worst winters out of ten. WINTER CONCENTRATION: That part of the winter range where animal densities are at least 200% greater than the surrounding winter range density during the same period used to define winter range in the average five winters out of ten. WINTER RANGE: That part of the overall range where 90 percent of the individuals are located between the first heavy snowfall and spring green-up during the average five winters out of ten OR for a site specific period defined by CDOW personnel for that DAU. Winter Range is only delineated for migratory populations. On the Eastern Plains Winter Range is defined as specific areas where pronghorn are known to migrate to on a consistent basis. This information was derived from Colorado Parks and Wildlife field personnel. Data was captured by digitizing through a SmartBoard Interactive Whiteboard using topographic maps and NAIP imagery at various scales (Cowardin, M., M. Flenner. March 2003. Maximizing Mapping Resources. GeoWorld 16(3):32-35). These data are updated on a four year rotation with one of the four Colorado Parks and Wildlife Regions updated each year. These data are not updated on a statewide level annually.