Environment and Climate Change Canada

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.

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.

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

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

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

The Canadian Breeding Bird Census (BBC) Database contains data for 928 breeding bird plot censuses representing all known censuses of breeding birds carried out in Canada during the period 1929–1993. The 928 records in the database represent 640 unique census plots located in all provinces and...

Populations of North American breeding scoters appear to be declining, however a large degree of uncertainty remains around population size estimates and trends due to challenges related to surveying this group of sea ducks. From 2017-2019, The Canadian Wildlife Service conducted helicopter...

This spreadsheet dataset contains information on boat-based surveys of alcid marine birds between Sidney, BC and Victoria, BC from November 2015 to August 2019. The marine birds species surveyed in this dataset are the Rhinoceros Auklet (Cerorhinca monocerata), Common Murre (Uria aalge), Marbled...

Data Sources: Banque informatisée des oiseaux de mer au Québec (BIOMQ: ECCC-CWS Quebec Region) Atlantic Colonial Waterbird Database (ACWD: ECCC-CWS Atlantic Region).. Both the BIOMQ and ACWD contain records of individual colony counts, by species, for known colonies located in Eastern Canada....

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