Rare species is a point feature class containing rare species sightings.

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

Sidney Island Shorebird Surveys transects area feature.

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

This polygon outlines the basic area included in the survey counts. This area is the best approximation of the mudflat that can be surveyed from shore and is exposed at tide tide height of 3.5 m, based on tidal predictions at Point Atkinson, British Columbia.

Survey points is a point feature class containing transects and observations completed in 2011.

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.

Sidney Island Shorebirds Survey transects line feature.