Study

Translocation of black-billed magpies Pica pica increases the number of juvenile blue tits Parus caeruleus and the number of adult long-tailed tits Aegithalos caudatus, but appears to reduce the number of adult blackcaps Sylvia atricapilla and has no effect on seven other species of songbird

  • Published source details Chiron F.O. & Julliard R. (2007) Responses of songbirds to magpie reduction in an urban habitat. The Journal of Wildlife Management, 71, 2624-2631

Actions

This study is summarised as evidence for the following.

Action Category

Reduce predation by translocating predators

Action Link
Bird Conservation
  1. Reduce predation by translocating predators

    A paired sites before-and-after trial at two urban locations in the Paris area, France, between 2003 and 2005 (Chiron & Julliard 2007) found that the number of juvenile blue tits Parus caeruleus increased by 40% and the number of adult long-tailed tits Aegithalos caudatus increased 50 fold following the removal of 91 black-billed magpies Pica pica from experimental sites (a 58% reduction in density), with no corresponding increase in control sites where magpies were not removed. However, removal appeared to cause a 70% reduction in the number of adult blackcaps Sylvia atricapilla. There was no change in the number of juveniles or adults in seven other species.

     

Output references

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