– ecology and natural resource consulting since 1978  

Threatened, Endangered & Rare Species

Ute Ladies' Tresses Orchid
Federal Threatened Species

Western Ecological Resource plant ecologists and wildlife biologists have a comprehensive understanding of the Endangered Species Act and are familiar with the ecology of numerous federally listed species, as well as U.S. Forest Service and Bureau of Land Management sensitive species in Colorado and the western United States.  We have conducted field surveys and project site clearances for many of the plants and animals on these lists and developed plans for habitat protection.  We also prepare Biological Assessments and Biological Evaluations to address potential development impacts to these species.  We work closely with the U.S. Fish and Wildlife Service during Section 7 Consultations and are experienced in developing effective Habitat Conservation Plans.

                                        Our Rare Species Services Include:

                                        - Federally listed and sensitive species clearance surveys
                                        - Biological Assessments and Biological Evaluations
                                        - Habitat assessments
                                        - Habitat mapping and protection plans
                                        - Analysis of development impacts to listed species
                                        - Mitigation plans and Habitat Conservation Plans
                                        - Endangered Species Act Section 7 Consultations


  Surveys and Habitat Assessments

Harrington Penstemon
USFS and BLM Sensitive Species

Populations of Harrington Penstemon identified during a survey
are mapped on an aerial photograph

Our plant ecologists and wildlife biologists have expertise in identifying habitats for federally listed and sensitive species, conducting clearance surveys, and documenting and mapping populations using GIS technology.  Our use of the latest GPS and GIS technology facilitates accurate and efficient surveys, and allows us to precisely quantify and map populations on aerial photograph and topographic base maps.  Our survey results are summarized in detailed reports that include high-quality graphics documenting the locations of rare species relative to proposed developments.

  Impact Assessment and Mitigation Plans

Juvenile Bald Eagle
State of Colorado Theatened Species

Map of Bald Eagle Roost Sites

We have considerable experience in determining the effects of proposed developments on federally listed and sensitive species and in providing recommendations to avoid and minimize impacts.  We have produced Biological Assessments for most of the federally listed species in Colorado and for many of the species on the Bureau of Land Management and U.S. Forest Service Sensitive Species Lists.  We have also produced impact assessments for many of Colorado's state-listed wildlife species.  We are experienced in the Section 7 Consultation Process and work closely with the U.S. Fish and Wildlife Service to prepare Habitat Conservation Plans for federally listed species.  For example, we developed and are currently implementing a Habitat Conservation Plan for Preble's meadow jumping mouse, a federally listed threatened species.  We are creating wetlands and riparian habitat, establishing a buffer of native grasses, and controlling populations of noxious weeds to create habitat for the mouse along Plum Creek in Douglas County, Colorado.

  Threatened, Endangered, and Sensitive Plants

Colorado Hookless Cactus
Federal Threatened Species

Federally listed and candidate plant species we frequently work with in Colorado include the Ute ladies' tresses orchid, Colorado butterfly plant, Osterhout milkvetch, Colorado hookless cactus, and DeBeque and North Park phacelia.  Our plant ecologists are certified by the U.S. Fish and Wildlife Service Denver Regulatory Office to conduct surveys for the Ute ladies' tresses orchid.  We also have extensive experience with many sensitive plants listed by the Bureau of Land Management and U.S. Forest Service.  We frequently conduct surveys for dwarf milkweed, moonworts, DeBeque milkvetch, Naturita milkvetch, adobe thistle, willow hawthorn, and many others.  Our plant ecologists are considered authorities on Harrington penstemon, a sensitive plant found in central Colorado. During an electric transmission line survey in western Colorado, our senior ecologist discovered a new plant, Penland penstemon, which is now on the federal endangered species list.    

  Threatened, Endangered and Sensitive Wildlife

Ferruginous Hawks
State of Colorado Species of Special Concern

Our wildlife biologists are skilled in conducting surveys and habitat assessments for federally listed wildlife species including the Canada lynx, Preble's meadow jumping mouse, black-footed ferret, southwestern willow flycatcher, Mexican spotted owl, piping plover, least tern, greenback cutthroat trout, and the four endangered Colorado river fish: the razorback sucker, bonytail, humpback chub, and Colorado pikeminnow.  Our wildlife biologists are certified by the U.S. Fish and Wildlife Service to conduct surveys for the Mexican spotted owl and the southwestern willow flycatcher.  We also conduct surveys and assessments for threatened, endangered, and special concern wildlife listed by the State of Colorado.   State-listed species we frequently conduct surveys and habitat assessments for include the boreal toad, northern leopard frog, bald eagle, burrowing owl, ferruginous hawk, Gunnison sage grouse, river otter, black-tailed prairie dog and swift fox.   

Greater Sage Grouse
State of Colorado Species of Special Concern 

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