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Science 22 February 2008:
Vol. 319. no. 5866, p. 1042
DOI: 10.1126/science.1151939
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Technical Comments

Response to Comment on "International Conservation Policy Delivers Benefits for Birds in Europe"

Paul F. Donald,1* Fiona J. Sanderson,1 Ian J. Burfield,2 Stijn M. Bierman,3 Richard D. Gregory,1 Zoltan Waliczky1

Rodríguez-Muñoz et al. raise concerns about our study on the effectiveness of the European Union's Birds Directive, based on the provenance of the trend data used and on the predictions that were tested. Here, we show that our results are robust to different assumptions of uncertainty surrounding trend estimates and that criticisms of the methods stem largely from misunderstandings of the original paper.

1 Royal Society for the Protection of Birds, The Lodge, Sandy, Bedfordshire SG19 2DL, UK.
2 BirdLife International, Wellbrook Court, Girton Road, Cambridge CB3 0NA, UK.
3 Biomathematics and Statistics Scotland, The King's Buildings, Edinburgh EH9 3JZ, UK.

* To whom correspondence should be addressed. E-mail: paul.donald{at}rspb.org.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)