Action

Action Synopsis: Bird Conservation About Actions

Control predators not on islands

How is the evidence assessed?
  • Effectiveness
    not assessed
  • Certainty
    not assessed
  • Harms
    not assessed

Source countries

Key messages

A single replicated and randomised, paired sites study from the UK found that plots with predator control had increased density and fledgling success of breeding birds.

 

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A replicated, randomised, paired site study from March-July in 2000-2008 in 2 pairs of plots (9.3-14.4 km2) in Northumberland, UK (Fletcher et al. 2010) found that plots where predators were experimentally controlled displayed increased density and fledgling success of breeding birds. Reductions in foxes Vulpes vulpes and carrion crows Corvus corone led to an average threefold increase in the percentage of pairs fledging young of lapwing Vanellus vanellus, golden plover Pluvialis apricaria, curlew Numenius arquata, red grouse Lagopus lagopus scoticus and meadow pipit Anthus pratensis; and subsequently led to increases in breeding numbers (? 14%/year) of lapwing, curlew, golden plover and red grouse, all of which declined in the absence of predator control (? 17%/year). There was no significant effect of predator culling for any wader species. Predator culling reduced the abundance of fox by 43% and crow 78%.

    Study and other actions tested
Please cite as:

Williams, D.R., Child, M.F., Dicks, L.V., Ockendon, N., Pople, R.G., Showler, D.A., Walsh, J.C., zu Ermgassen, E.K.H.J. & Sutherland, W.J. (2020) Bird Conservation. Pages 137-281 in: W.J. Sutherland, L.V. Dicks, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2020. Open Book Publishers, Cambridge, UK.

 

Where has this evidence come from?

List of journals searched by synopsis

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Bird Conservation

This Action forms part of the Action Synopsis:

Bird Conservation

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

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