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According to Sean Cunningham and Robert D. Magrath, in the article titled “Functionally referential alarm calls in noisy miners communicate about predator behavior”, they hypothesized that the noisy miners gave two differently alarm calls in different models that they have been set up which are aerial alarm calls and ‘chur’ alarm calls. They added, these noisy miners even have a contradict behavior in two types of threat which are aerial threats and terrestrial threats. The authors of this article proposed neat methods for their research; before they started their research, they studied the species deeply and concisely so that the readers know what kind of species they are doing for their research. Besides, the researchers also added the …show more content…

They measured the frequency but not the amplitude of both models and observed the different between them. In the same study, the researchers also added the method on the response to alarm calls where the examined the miners by carried out a playback experiment and observed the response of the miners. They designed four playback treatments which are aerial alarm calls, short chur alarm call, a long sequence of chur alarm, and a control contact call of the crimson rosella. The sites of the playbacks are replicated and for the experimental sites for chur and aerial are stay the same while the controlled were recorded in Canberra. The recordings are chosen in high quality and were standardized by removing or repeating the element if necessary. Both researchers were using paired t-test to compare their experiment’s model. Sean Cunningham and Robert D. Magrath concluded their experiment by stating the support from Greisser’s (2008) conclusion which said the alarm call in the bird or even mammals lead to protect themselves more than just the taxonomic categories. In addition, both researchers state that the noisy miners have their own specific functional references for aerial and chur alarm calls. This is because the noisy miner specifically knows the different between the two alarm calls. All in all, the predator behavior is the main thing that relates to the context of alarm calls production in birds and mammals. Based on the research lead by Sean

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