Lee A. Walker,^* Richard F. Shore,^** Anthony Turk,^*** M. Glória Pereira,^**** Jennifer Best<sup>*****


*</sup>Lee Walker is a vertebrate ecotoxicologist at the Centre for Ecology and Hydrology and is the coordinator for the Predatory Bird Monitoring Scheme. His address: NERC Centre for Ecology & Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster LA1 4AP, UK. leew@ceh.ac.uk
^**Richard Shore is a section head within the Centre for Ecology and Hydrology and the principle scientist for the Predatory Bird Monitoring Scheme. His research interests include studying the exposure and effects of pollutants, biocides and pesticides in wild birds and mammals. His address: NERC Centre for Ecology & Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster LA1 4AP, UK. rfs@ceh.ac.uk
^***M. Glória Pereira is an ecotoxicologist specializing in environmental chemistry at the Centre for Ecology and Hydrology. Her main research interest is to relate chemical exposure of biota to effects and the transfer of chemicals through the food web. Her address: NERC Centre for Ecology & Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster LA1 4AP, UK. mdgds@ceh.ac.uk
^****Anthony Turk is a scientist at the Centre for Ecology and Hydrology specializing in post mortem examination of vertebrate wildlife. His address: NERC Centre for Ecology & Hydrology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire PE28 2LS, UK. atur@ceh.ac.uk
^*****Jennifer Best is the senior specialist for pesticides and toxic substances in the evidence team of Natural England. Her address: Natural England, Northminster House, Peterborough, PE1 1UA, UK. jennifer.Best@naturalengland.org.uk