Median and 10th and 90th percentiles of nest and random sites for variables that influence nest-site selection of Piping Plovers on Lake Sakakawea.

aPercent coverage of silt in substrate at site.bPercent coverage of gravel in substrate at site.cPresence or absence of a cobble.dRelative elevation of the nest above the pool level at initiation.eSlope within 1 m of the site.fPercent bare substrate obstruction (vegetation+leaf litter+small debris).gSlope within 3 m of the site.hPercent coverage of gravel in substrate 10 m from the site.