CampbellK. A., ThunbergS. and SturdyC. B. (2019) “Features of Male- and Female-Produced Song in Black-Capped Chickadees (Poecile Atricapillus) Change Between Seasons”, Canadian Acoustics, 47(3), pp. 36-37. Available at: //jcaa.caa-aca.ca/index.php/jcaa/article/view/3348 (Accessed: 24February2020).