Can common cuckoos discriminate between neighbours and strangers by their calls?

Csaba Moskát, Zoltán Elek, Miklós Bán, Nikoletta Geltsch, Márk E. Hauber

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Common cuckoos, Cuculus canorus, are brood parasites: they lay their eggs in the nests of other bird species, and let these hosts incubate their eggs and feed and rear the nestlings. Although cuckoos do not show parental care, they demonstrate complex social interactions, including territorial behaviours and male–male aggression. Cuckoos have a well-known and simple two-phrase call (‘cu’ and ‘coo’), uttered by males during their breeding season. Previous studies suggested that the ‘cu-coo’ call of males is individually unique, potentially allowing discrimination between different classes of males. Using playback experiments in a dense population of radiotagged cuckoos, we tested whether neighbouring males are tolerated more than unfamiliar intruders: the classic ‘dear enemy’ phenomenon. Focal birds responded more aggressively to the calls of unfamiliar simulated intruders (strangers) than to the calls of conspecifics with whom they shared territorial boundaries (familiar neighbours). Cuckoos responded quickly, within, on average, less than half a minute; they often approached the loudspeaker to within 5–10 m, even from up to 80 m away, and used their ‘cu-coo’ calls in response. Our results showed that cuckoos used their simple call for the discrimination of familiar versus unfamiliar individuals, and did so specifically to defend their own territories. In turn, cuckoos showed tolerance to nearby conspecifics, for example neighbours with overlapping territories, and did not respond to control playbacks. Finally, as typically more than one cuckoo was interested in the playbacks, this study confirmed the opportunity for brood-parasitic birds to socialize during the breeding season.

Original languageEnglish
Pages (from-to)253-260
Number of pages8
JournalAnimal Behaviour
Volume126
DOIs
Publication statusPublished - Apr 1 2017

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Keywords

  • acoustic playback
  • aggressive behaviour
  • dear enemy phenomenon
  • individual discrimination
  • territorial defence

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

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