Action

Action Synopsis: Bird Conservation About Actions

Translocate herons, storks and ibises

How is the evidence assessed?

Source countries

Key messages

A before-and-after study in the USA found that a colony of black-crowned night herons Nycticorax nycticorax was successfully moved, with the new colony producing chicks the year after translocation.

 

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 before-and-after trial at a coastal site in Long Beach, California, USA (Crouch et al. 2002), found that 423 pairs of black-crowned night herons Nycticorax nycticorax successfully fledged 1,128 chicks in 2000, following the translocation of the colony beginning in 1999. The former colony was threatened by port development, so 50 mature trees were relocated 2 km away near approximately 70 existing trees. In addition, vocalisations of the original colony were played, decoys placed in the trees and public access stopped. Before the translocation, the old colony held up to 500 pairs of herons.

    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. (2019) Bird Conservation. Pages 141-290 in: W.J. Sutherland, L.V. Dicks, N. Ockendon, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2019. 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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