Host response to cuckoo song is predicted by the future risk of brood parasitism

Sonia Kleindorfer, Christine Evans, Diane Colombelli-Négrel, Graham Robertson, Matteo Griggio, Herbert Hoi

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Introduction: Risk assessment occurs over different temporal and spatial scales and is selected for when individuals show an adaptive response to a threat. Here, we test if birds respond to the threat of brood parasitism using the acoustical cues of brood parasites in the absence of visual stimuli. We broadcast the playback of song of three brood parasites (Chalcites cuckoo species) and a sympatric non-parasite (striated thornbill, Acanthiza lineata) in the territories of superb fairy-wrens (Malurus cyaneus) during the peak breeding period and opportunistic breeding period. The three cuckoo species differ in brood parasite prevalence and the probability of detection by the host, which we used to rank the risk of parasitism (high risk, moderate risk, low risk).Results: Host birds showed the strongest response to the threat of cuckoo parasitism in accordance with the risk of parasitism. Resident wrens had many alarm calls and close and rapid approach to the playback speaker that was broadcasting song of the high risk brood parasite (Horsfield's bronze-cuckoo, C. basalis) across the year (peak and opportunistic breeding period), some response to the moderate risk brood parasite (shining bronze-cuckoo, C. lucidus) during the peak breeding period, and the weakest response to the low risk brood parasite (little bronze-cuckoo, C. minutillus). Playback of the familiar control stimulus in wren territories evoked the least response.Conclusion: Host response to the threat of cuckoo parasitism was assessed using vocal cues of the cuckoo and was predicted by the risk of future parasitism.

    Original languageEnglish
    Article number30
    Pages (from-to)30-39
    Number of pages10
    JournalFrontiers in Zoology
    Volume10
    Issue number1
    DOIs
    Publication statusPublished - 22 May 2013

    Keywords

    • Cuckoo recognition
    • Cuckoo threat
    • Deterrent behaviour
    • Experience
    • Risk perception
    • Song discrimination

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