Rebound stimuli presented. The focal subject hears its 25th stimuli, the rebound stimuli. This consisted of another chur call recorded from Bird A, that is the individual used in the habituation series, that the subject had not previously heard. Note the continued minimal and relatively slow response.
This research was published in the journal Biology Letters in the paper: 'Cooperative bird differentiates between the calls of different individuals, even when vocalizations were from completely unfamiliar individuals' by Paul G. McDonald. The doi link for the article is http://rsbl.royalsocietypublishing.org/lookup/doi/10.1098/rsbl.2011.1118
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