@article{Houston_McGowan_1999, title={The westward spread of the barred owl}, volume={57}, url={https://bluejayjournal.ca/index.php/bluejay/article/view/5645}, DOI={10.29173/bluejay5645}, number={4}, journal={Blue Jay}, author={Houston, C. Stuart and McGowan, Kevin J.}, year={1999}, month={Dec.} }