GenEst statistical models—A generalized estimator of mortality

Techniques and Methods 7-A2
Prepared in cooperation with Bureau of Land Management and the National Renewable Energy Laboratory
By: , and 



GenEst (a generalized estimator of mortality) is a suite of statistical models and software tools for generalized mortality estimation. It was specifically designed for estimating the number of bird and bat fatalities at solar and wind power facilities, but both the software (Dalthorp and others, 2018) and the underlying statistical models are general enough to be useful in various situations to estimate the size of open populations when detection probabilities and search coverages are less than 1. In this report, we outline the statistical models and data structures underlying the estimator. The models are numerous, complex, and intricately interwoven. Discussion begins with broad, high-level overviews of the general models. The lower-level technical details are then gradually added. Broader and less technical discussions on the general context and applications of the models and the use of the software are available in the software user guide (Simonis and others, 2018), vignettes bundled with the software, and the help files within the software itself.

Suggested Citation

Dalthorp, D., Madsen, L., Huso, M., Rabie, P., Wolpert, R., Studyvin, J., Simonis, J., and Mintz, J., 2018, GenEst statistical models—A generalized estimator of mortality: U.S. Geological Survey Techniques and Methods, book 7, chap. A2, 13 p.,

ISSN: 2328-7055 (online)

Table of Contents

  • Section 1—Introduction
  • Section 2—Splitting Mortality Estimates by Carcass and Recombining into Subgroups
  • Section 3—Temporal Splits
  • Section 4—Estimation of Arrival Probabilities
  • Section 5—Uncertainty in Estimating 𝑀|(𝑋,𝑔)
  • Section 6—Accounting for Unsearched Area
  • Section 7—Searcher Efficiency
  • Section 8—Carcass Persistence
  • References Cited

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title GenEst statistical models—A generalized estimator of mortality
Series title Techniques and Methods
Series number 7-A2
DOI 10.3133/tm7A2
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description Report: iv, 13 p.; Data Release
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Section A: Algorithm in Book 7:Automated data processing and computations
Public Comments This report is Chapter 2 of Section A: Algorithm in Book 7:Automated data processing and computations.
Online Only (Y/N) Y