Igic B, Ratnayake CP, Radford AN, Magrath RD. Eavesdropping magpies respond to the number of heterospecifics giving alarm calls but not the number of species calling. Animal Behaviour. 2019;148:133 - 143.

Cunningham S, Magrath RD. Functionally referential alarm calls in noisy miners communicate about predator behaviour. Animal Behaviour. 2017;129:171 - 179. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0003347217301586.