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#' @name sparrowSiteData
#'
#' @title Brewer's Sparrow site data
#'
#' @description
#' Site data from line transect surveys for
#' Brewer's sparrow on 72 transects
#' located on a 4105 km^2 study
#' area in central Wyoming. Data were collected by
#' Dr. Jason Carlisle of the Wyoming Cooperative Fish & Wildlife
#' Research Unit in 2012. Each transect was 500 meters long.
#' See the package vignettes for tutorials of the basic analysis.
#'
#' @docType data
#'
#' @format A data.frame containing 72 rows and 8 columns. Each row represents
#' a site (transect) surveyed. Column descriptions:
#'
#' \enumerate{
#' \item \code{siteID}: Factor (72 levels), the site or transect surveyed.
#' \item \code{length}: Number, the length (m) of each transect.
#' \item \code{observer}: Factor (five levels), identity of the observer
#' who surveyed the transect.
#' \item \code{bare}: Number, the mean bare ground cover (\%) within 100 m of each transect.
#' \item \code{herb}: Number, the mean herbaceous cover (\%) within 100 m of
#' each transect.
#' \item \code{shrub}: Number, the mean shrub cover (\%) within
#' 100 m of each transect.
#' \item \code{height}: Number, the mean shrub height
#' (cm) within 100 m of each transect.
#' \item \code{shrubclass}: Factor (two levels), shrub class is "Low"" when
#' shrub cover is < 10\%, "High" otherwise.
#' }
#'
#' @seealso \code{\link{sparrowDetectionData}}
#'
#' @source The Brewer's sparrow data are a subset of the data collected
#' by Jason Carlisle and various field technicians for his Ph.D. from the
#' Department of Ecology, University of Wyoming, in 2017. This portion of
#' Jason's work was funded by the Wyoming Game and Fish Department through agreements
#' with the University of Wyoming's Cooperative Fish & Wildlife
#' Research Unit (2012).
#'
#' @references Carlisle, J.D. 2017. The effect of sage-grouse conservation on
#' wildlife species of concern: Implications for the umbrella species concept.
#' Dissertation. University of Wyoming, Laramie, Wyoming, USA.
#'
#' Carlisle, J. D., and A. D. Chalfoun. 2020. The abundance of Greater
#' Sage-Grouse as a proxy for the abundance of sagebrush-associated songbirds
#' in Wyoming, USA. \emph{Avian Conservation and Ecology} 15(2):16.
#' \doi{10.5751/ACE-01702-150216}
#'
#' @keywords datasets
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