Action

Action Synopsis: Bird Conservation About Actions

Provide supplementary food for kingfishers to increase reproductive success

How is the evidence assessed?
  • Effectiveness
    33%
  • Certainty
    13%
  • Harms
    0%

Study locations

Key messages

A controlled study in the USA found that belted kingfisher Ceryle alcyon supplied with food had heavier nestlings and were more likely to renest. There was mixed evidence for the effect of feeding on laying date.

 

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 controlled study of breeding pairs of belted kingfisher Ceryle alcyon in Colorado, USA (Kelly & Van Horne 1997), found that birds that nested earlier had heavier nestlings and were more likely to renest in the event of nest failure.  In 1994 and 1995, food supplementation from early in the prebreeding season (8 March) was associated with earlier nest initiation.  However, no supplemented nests occurred earlier than the earliest nests in 1992, in which there had been no feeding stations.   A smaller amount of food started later in the season (20 April) in the previous year had been without effect.

    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, forests, peatland and control of freshwater invasive species. More are in progress.

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