@ARTICLE{Osiejuk_Tomasz_S._The_2016, author={Osiejuk, Tomasz S.}, number={Nr 3 (47) Singularity}, journal={ACADEMIA. The magazine of the Polish Academy of Sciences}, pages={42-45}, howpublished={online}, year={2016}, publisher={Polish Academy of Sciences}, language={eng}, abstract={Horns, teeth, claws, beaks… Given this mighty arsenal it’s a wonder there isn’t more physical conflict in the animal world, such as among birds.}, type={Article}, title={The voice of aggression}, URL={http://www.czasopisma.pan.pl/Content/112734/PDF-MASTER/042-045%20osiejuk_ang.pdf}, keywords={birds aggression, vocal signaling in birds}, }