unmarked is an R package for analyzing ecological data arising from several popular sampling techniques. The sampling methods include point counts, occurrence sampling, distance sampling, removal, double observer, and many others. unmarked uses hierarchical models to incorporate covariates of the latent abundance (or occupancy) and imperfect detection processes.

Installation

The latest stable version of unmarked can be downloaded from CRAN:

install.packages("unmarked")

The latest development version can be installed from Github:

install.packages("remotes")
remotes::install_github("hmecology/unmarked")

Support

Support is provided through the unmarked Google group. The package website has more information. You can report bugs here, by posting to the Google group, or by emailing the current maintainer.

Get Started

See the following vignettes for an introduction to unmarked and some example analyses:

Overview of unmarked

Dynamic occupancy models

Multispecies occupancy models

Distance sampling

Contributing to unmarked