Fouda L, Wingfield JE, Fandel AD, mfl. Dolphins simplify their vocal calls in response to increased ambient noise. Biology Letters. 2018;14(10):20180484. Available at: http://rsbl.royalsocietypublishing.org/lookup/doi/10.1098/rsbl.2018.0484https://syndication.highwire.org/content/doi/10.1098/rsbl.2018.0484.

Barber JR, Kawahara AY. Hawkmoths produce anti-bat ultrasound. Biology Letters. 2013;9(4):20130161 - 20130161. Available at: http://rsbl.royalsocietypublishing.org/cgi/doi/10.1098/rsbl.2013.0161https://syndication.highwire.org/content/doi/10.1098/rsbl.2013.0161.

Araya-Salas M, Wright T. Open-ended song learning in a hummingbird. Biology Letters. 2013;9(5):20130625 - 20130625. Available at: http://rsbl.royalsocietypublishing.org/cgi/doi/10.1098/rsbl.2013.0625.