CPW Bald Eagle Shapefile Download

Last Updated December, 2025 NEST SITES: ACTIVE NESTSITES: The nest status was reported as Occupied Failed or Occupied Intact in the last 5 years. INACTIVE NESTSITES: The nest status was reported as Unoccupied Intact or Unoccupied Dilapidated in the last 5 years. UNDETERMINED NESTSITES: The nest status was reported with an Undetermined status in the last 5 years. DESTROYED: The nest status was reported as Destroyed in the last monitoring record. UNKNOWN NESTSITES: The nest does not have a recorded monitoring record in over 5 years. COMMUNAL ROOST: Groups of or individual trees used by more than 15 eagles for diurnal and/or nocturnal perches. ROOST SITES: Groups of or individual trees that provide diurnal and/or nocturnal perches for less than 15 wintering bald eagles; includes a buffer zone extending 1/4 mile around these sites. These trees are usually the tallest available trees in the wintering area and are primarily located in riparian habitats. SUMMER FORAGE: Foraging areas frequented by breeding bald eagles from March 15 to July 30. These areas are almost always associated with nesting pairs. WINTER CONCENTRATION: Areas (tree, islands, etc.) within an existing winter range where eagles concentrate between November 15 and April 1. These areas may be associated with roost sites. WINTER FORAGE: Foraging areas frequented by wintering bald eagles between November 15 and March 15. May be a large area radiating from preferred roosting sites. In western Colorado preferred roosting sites are within dominant riparian zones. WINTER RANGE: Those areas where bald eagles have been observed between November 15 and April 1 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.