Biology and Ecosystems

Learn more about animal population analysis, and access, explore, and download U.S. species occurrence data.

Filter Total Items: 69
Date published: August 12, 2015


Computes estimates of survival and capture probability for open capture-recapture models when sex is not allways known.

Date published: January 29, 2014


Generates capture-history data for given s,theta,p,c.

Date published: June 7, 2013


Computes estimates of species richness using large scale data.

Date published: December 11, 2012

Fatality Estimator Software

Tool to Evaluate Wildlife Fatalities at Wind-Power Facilities

Date published: November 1, 2012

Douglas Argos-Filter Algorithm

Version 8.50 of the Douglas Argos-Filter (DAF) is qualitatively equivalent to the algorithm that is now freely available through Movebank (, and described in a 2012 article published in Methods in Ecology and Evolution.

Date published: July 9, 2012

Physical Habitat Simulation (PHABSIM) Software for Windows

The purpose of the Physical Habitat Simulation System (PHABSIM) is to simulate a relationship between streamflow and physical habitat for various life stages of a species of fish or a recreational activity. 

Date published: March 23, 2012

SmartRiver GIS

Smart River GIS allows simultaneous views of river hydraulics, species-specific habitat, and fish population simulations, for a better understanding of complex ecological interactions. We used existing data sets from the South Platte River in Colorado to develop a multi-layered geographic information system (GIS) that resource managers can use to improve their understanding of river...

Date published: January 1, 2012

Software for Assisted Habitat Modeling Package for VisTrails (SAHM: VisTrails) v.1

The Software for Assisted Habitat Modeling for VisTrails has been created to both expedite habitat suitability modeling and help maintain a record of the various input data, pre- and post- processing steps, and modeling options incorporated in the construction of a species distribution model. 

Date published: December 11, 2011


Computes survival-movement, capture and recovery probabilities from multi-strata capture-recapture-recovery data.

Date published: February 16, 2010


A Program to Estimate Animal Abundance and Density using Spatially-Explicit Capture-Recapture

Date published: March 30, 2005


Computes estimates of survival and capture probability for 1-age class open population capture-recapture models.

Date published: August 19, 2004


Computes estimates of survival and capture probability adjusted for missclassification.