Strategic Variation in Mobbing as a Front Line of Defense against Brood Parasitism

@article{Welbergen2009StrategicVI,
  title={Strategic Variation in Mobbing as a Front Line of Defense against Brood Parasitism},
  author={Justin A. Welbergen and Nicholas Barry Davies},
  journal={Current Biology},
  year={2009},
  volume={19},
  pages={235-240}
}

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References

SHOWING 1-10 OF 43 REFERENCES
Escalation of a coevolutionary arms race through host rejection of brood parasitic young
TLDR
It is shown that the breach of host egg defences by cuckoos creates a new stage in the coevolutionary cycle and is suggested that it has selected for the evolution of nestling mimicry in bronze-cuckoos.
Evolution of Defence Portfolios in Exploiter–Victim Systems
TLDR
The circumstances under which defence strategies might be expected to evolve are investigated, and it is suggested that the answers lie in strategy-blocking, where one strategy prevents the appearance of another (the blocked strategy) that would be adaptive in its absence.
HOST RECOGNITION OF BROOD PARASITES: IMPLICATIONS FOR METHODOLOGY IN STUDIES OF ENEMY RECOGNITION
Abstract Various studies have shown that experiments on nest defense and enemy recognition (e.g. recognition of adult brood parasites) can be confounded by many factors. However, no study has
Evolution of bird eggs in the absence of cuckoo parasitism.
  • D. Lahti
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 2005
TLDR
Examination of two independent introductions of the African village weaverbird to islands where selection on egg appearance traits is expected to differ markedly from that of the source populations shows that between-individual variation and within-clutch consistency in egg appearance have both decreased, as has the incidence of spotting, relative to the source population in Africa.
Cuckoos versus reed warblers: Adaptations and counteradaptations
Are Blackcaps (Sylvia atricapilla) defending their nests also calling for help from their neighbours?
  • T. Grim
  • Environmental Science
    Journal of Ornithology
  • 2007
TLDR
It is argued that this hypothesis is unlikely to apply to typical avian predators during nest predation acts because these only last for several seconds, and the observed pattern of the positive correlation between the intensity of nest defence and the number of attracted birds is most likely a proximate by-product of the conspicuous nest defence by Blackcaps.
Rapid decline of host defences in response to reduced cuckoo parasitism: behavioural flexibility of reed warblers in a changing world
TLDR
On Wicken Fen and nearby watercourses eastern England, parasitism by cuckoos, Cuculus canorus, declined from 26% and 16% of reed warbler nests in 1985 and 1986 to 2 to 6% of nests in 1995 to 1997, owing to a decline in cuckoo.
Antipredator Defenses in Birds and Mammals
TLDR
In Antipredator Defenses in Birds and Mammals, Tim Caro ambitiously synthesizes predator defenses in birds and mammals and integrates all functional and evolutionary perspectives on antipredator defenses that have developed over the last century.
Cuckoo–hawk mimicry? An experimental test
TLDR
The first evidence that some small birds respond to common cuckoos Cuculus canorus as if they were sparrowhawks Accipiter nisus is provided, and tits showed similarly strong alarm to barred and unbarred hawks, and little alarms to barred doves, suggesting that naive small birds can mistake cuckoo for hawks.
Cuckoos, Cowbirds and Other Cheats
TLDR
This book discusses the co-evolution of host defences and Common Cuckoo trickery, as well as one hundred species of brood parasitic birds and some puzzles.
...
...