Field guide to Canadian Birds based on the Gaia Guide website (https://www.gaiaguide.info/).
Almost all species descriptions include several identification photos. The descriptions also include distribution maps. A growing number of descriptions include recordings of bird calls. Along with descriptions of distinguishing features, details of size, habitat preferences, diet and other details, this information provides an increasingly effective means of identifying birds that can be found in Canada.
To use the guide, drill down though the species groups to find a group that you think is likely to contain the species you have observed. Then you can tap the magnifying glass button to see all identification images for species in the chosen group. You can refine the filter via the filter tab, selecting only those species that have the chosen colours. The required accuracy of the colour filter can be adjusted to refine or broaden the number of species that match your search. For groups of species with size and wingspan data you can also filter based upon size and wingspan estimates.
Once you find an image that matches, view the description details for that species to confirm the identification.