Average grid cell density is a polygon feature class containing the average density value for each grid cell per species/groups and season.

Survey areas is a polygon feature class containing mudflats and staging areas observed for shorebirds.

Sidney Island Shorebird Surveys transects area feature.

Grids surveyed is a polygon feature class containing the 5’ latitude by 5’ longitude grid cells surveyed for all seasons combined including the grids that were surveyed but where no species were seen. In order to produce maps for a specific season a selection for these grids must be performed.

Survey effort is a polygon feature class with the original transects – for reference.

This line outlines the basic survey route included in the survey counts. This route is the best access to areas that can be surveyed from shore.

Study area is a polygon feature class showing the extent of where most of the bird sightings were recorded and then used in the atlas. A few rare species have been included as well that go beyond this area.

Survey transects is a line feature class containing transects completed in 2011.