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Chicks of the great spotted cuckoo may turn brood parasitism into mutualism by producing a foul-smelling secretion that repels predators.

Authors
  • Röder, Gregory
  • Canestrari, Daniela
  • Bolopo, Diana
  • Marcos, José M
  • Villard, Neil
  • Baglione, Vittorio
  • Turlings, Ted C J
Type
Published Article
Journal
Journal of Chemical Ecology
Publisher
Springer-Verlag
Publication Date
Apr 01, 2014
Volume
40
Issue
4
Pages
320–324
Identifiers
DOI: 10.1007/s10886-014-0426-0
PMID: 24760177
Source
Medline
License
Unknown

Abstract

The great spotted cuckoo (Clamator glandarius) is an important brood parasite of carrion crows (Corvus corone corone) in northern Spain. We recently found that, unlike what is commonly known for cuckoo-host interactions, the great spotted cuckoo has no negative impact on average crow fitness in this region. The explanation for this surprising effect is a repulsive secretion that the cuckoo chicks produce when they are harassed and that may protect the brood against predation. Here, we provide details on the chemical composition of the cuckoo secretion, as well as conclusive evidence that the dominating volatile chemicals in the secretion are highly repellent to model species representative of common predators of the crows. These results support the notion that, in this particular system, the production of a repulsive secretion by the cuckoo chicks has turned a normally parasitic interaction into a mutualistic one.

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