Best practices to account for capture probability and viewable area in camera?based abundance estimation

A suite of recently developed statistical methods to estimate the abundance and density unmarked animals from camera traps require accurate estimates area sampled by each camera. Although viewshed is fundamental achieving estimates, there are no established guidelines for collecting this information in field. Furthermore, while complexities detection process motion sensor photography generally acknowledged, viewable (the common factor between time lapse photography) on its own has been underemphasized. We establish a set terminology identify component parts area, contrast photographic capture measurements photography, review estimating use case study demonstrate importance estimates. Time combined with allow researchers assume that probability equals 1. Motion requires measuring distances animal fitting distance sampling curve account <1.