WebSim is an interactive simulation program designed to mimic the process of animals being trapped with trapping webs. The program was designed and written by Paul M. Lukacs as part of an M.S. project under Dr. David Anderson and Dr. Ken Burnham at the Colorado Cooperative Fish and Wildlife Research Unit in the Department of Fishery and Wildlife Biology at Colorado State University.

WebSim allows the user to set trapping webs of a variety of formats, establish a population of animals, and move the animals. WebSim then simulates trapping and sends the trapping data to program DISTANCE. Distance in turn calculates density estimates for each simulation. WebSim then summarizes the results in numerical and graphical formats. WebSim will interact with either Distance 3.5 or Distance 4. WebSim also works with the Link and Barker geometric estimator of animal density.

A second feature of WebSim is the Response Surface Analysis. A large scale simulation has been performed and a second order response surface fit to the results. The user is able to save time by plugging values into the response surface equation to determine an optimal design rather than run a large number of time consuming simulations