ERS biologists have conducted numerous siting, baseline and impact assessment studies, inventory and monitoring studies, threatened and endangered species surveys, and studies in support of ecological risk assessment. We have incorporated Habitat Evaluation Procedures (HEP), stream corridor inventory, and wetland investigation methods into many of our wildlife assessments. Our staff has worked with threatened and endangered species, small mammals, upland game birds, waterfowl, songbirds, shore birds, carnivores, big game animals, reptiles, amphibians, and invertebrates.

ERS uses a broad range of impact assessment tools to evaluate effects of projects on wildlife populations and terrestrial ecosystems. We have evaluated effects using impact matrixes, narratives, and qualitative and quantitative habitat and population models. We also employ GIS methods when assessing wildlife and terrestrial habitat.

Our primary service areas include:

  • Fishery & Aquatic Resources
  • Botanical & Wetland Resources
  • Ecological Research
  • Biological Assessments for Small Mammals, Big Game, Upland Birds, Insects, Reptiles and Amphibians, Songbirds and Raptors, and Waterfowl
  • Biological Laboratory Analyses (aquatic & terrestrial)
  • Threatened and Endangered Wildlife Resources
  • Wind & Solar Resource Site Development Evaluations
  • Bat Surveys Using Acoustics
  • Pipeline & Transmission Line Right of Way Investigations
  • Critical Habitat Identification and Investigation
  • Wildlife Habitat Assessment and Restoration
  • Geospatial Sciences
  • Ecosystem-based Natural Resource Management
  • Eco-asset Evaluation & Development
  • Agency Consultation & Permit Acquisition
  • Construction & Mitigation Monitoring
  • Climate Change Studies
  • Expert Witness Testimony
  • Ecological Risk Assessment
  • Integrated Resource Management
  • Habitat Conservation Planning
  • Hydro Relicensing
  • Facility Siting & Land Use Impact Analysis
  • Environmental Impact Statement & Report Preparation
  • ​Climate Change Vulnerability Assessment



  • Interior Least Tern and Piping Plover Nesting and Habitat Use Studies on the Loup and Lower Platte Rivers, Nebraska
  • Interior Least Tern and Piping Plover Nest Inundation Study on the Lower Platte River, Nebraska
  • Comprehensive Wildlife Habitat Restoration, Improvement and Management Plan for the Standing Rock Sioux Tribe Reservation, South and North Dakota
  • Aquatic and Terrestrial Invasive Species Monitoring Program for the Loup and Lower Platte Rivers, Nebraska.
  • Aquatic and Terrestrial Resource Surveys on Union Pacific Railroad Lands in the Western United States in Support of a Nationwide Eco-Asset Modeling Program
  • Assessment of Anuran Populations, with Emphasis on the Northern Leopard Frog, on the Cheyenne Indian Reservation, South Dakota
  • Rare and Sensitive Flora and Fauna Studies for the Strawberry Ranch, Wasatch County, Utah
  • Wildlife Assessment and Management Plan for the Double K Ranch, Colorado
  • Wildlife Assessment and Management Plan for the Historic Dunn Ranch, Kansas
  • Evaluation of Aquatic and Terrestrial Critical Habitat Components, with Emphasis on Prairie Chicken Habitat, on the Historic Dunn Ranch, Kansas
  • Comprehensive Wildlife Inventories for the Wild Property, Lyon County, Kansas: A Long Term Wildlife Management Plan
  • A Wildlife Habitat Evaluation and Comprehensive Habitat Improvement and Maintenance Plan for the Wild Property, Lyon County, Kansas
  • Design and Management Plans for Ponds and Enhanced Waterfowl Habitat on the Sports MVP Property, Lincoln County, Nebraska
  • A Wildlife and Habitat Evaluation for the Kenesaw Ranch, Logan County, Colorado
  • A Wildlife and Habitat Evaluation for the Garden County Gander Club, Garden County, Nebraska
  • An Overall Wildlife Inventory, Habitat Assessment and Enhancement Design, and Wildlife Management Plan for Prairie Marsh Farm, Lincoln County, Nebraska
  • Wildlife Investigations and Management Recommendations for the Black Buttes Area, Crook County, Wyoming
  • Comprehensive Riparian Wildlife Survey within the Virgin Creek Watershed, South Dakota
  • A Summary of Spatial and Temporal Statistical Analyses of Aerial Surveys for Whitetail Deer, Mule Deer, and American Pronghorn Conducted on the Cheyenne River Indian Reservation, South Dakota
  • Ecological Considerations of Livestock Utilization of Riparian Areas along River Systems on the Cheyenne River Indian Reservation, South Dakota: Recommendations for Long Term Protection of Critical Wildlife Habitat