@article{Sealy_2016, title={Wing-Flapping by Mud Gathering Cliff Swallows: Additional Comments}, volume={74}, url={https://bluejayjournal.ca/index.php/bluejay/article/view/267}, DOI={10.29173/bluejay267}, number={1}, journal={Blue Jay}, author={Sealy, Spencer G.}, year={2016}, month={Mar.}, pages={21–21} }