The R package secr provides methods for estimating animal density and detectability from SCR data undermany different conditions. First, you need to get your data into the format secr wants. There are 3 key input files

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• A "trapfile" containing camera trap locations and any covariates associated with them.

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• A "capthist" file containing records of animal encounters at cameras.

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• A "mask" (also sometimes called a "mesh" or "state space"), a discretised grid of points used for numerically maximizing the SCR likelihood, together with any covariates associated with these points.

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A quick-reference "cheatsheet" to supplement this video can be down loaded from this page.