“…Generalized linear models estimate relationships between photographic rates and prior density estimates (Rovero & Marshall, ), and N‐mixture models provide estimates of site‐specific abundance that can be used to infer differences between species or sites (Royle, ). However, these methods may be reliable only under specific circumstances, and often only as indices of relative abundance (Barker, Schofield, Link, & Sauer, ; Gopalaswamy, Delampady, Karanth, Kumar, & Macdonald, ). Alternatively, random encounter models directly estimate density using ideal gas law principles of particle movement (Nakashima, Fukasawa, & Samejima, ; Rowcliffe, Field, Turvey, & Carbone, ).…”