Population status

American Tree Sparrow
(Spizella arborea)

The Christmas Bird Count (CBC) provides the best population trend data for the American Tree Sparrow, since almost its entire winter range is well covered by the CBC. CBC data suggest little overall change in the continental population relative to 1970. Though CBC results combine data from the Canadian and United States' populations, the bulk of the American Tree Sparrow population breeds in Canada, thus the trend is probably representative of the Canadian population. The American Tree Sparrow breeds too far north to be well covered by the Breeding Bird Survey.

Christmas Bird Count (CBC)

Additional information on: Christmas Bird Count (CBC)

References

• Blancher, P. 2013. Estimated number of birds killed by house cats (Felis catus) in Canada. Avian Conservation and Ecology 8(2): 3. Blancher, P. 2013. Estimated number of birds killed by house cats (Felis catus) in Canada. Avian Conservation and Ecology 8(2): 3. (Link)
• Naugler, C.T. 1993. American Tree Sparrow (Spizella arborea), The Birds of North America Online (A. Poole, Ed.). Cornell Lab of Ornithology, Ithaca, New York. Naugler, C.T. 1993. American Tree Sparrow (Spizella arborea), The Birds of North America Online (A. Poole, Ed.). Cornell Lab of Ornithology, Ithaca, New York. (Link)