http://www.sasa.gov.uk/pesticide_wildlife/wiis/reports.cfm
thought this was a good site the rspb keep going on about the birds that are being killed by chemicals doesnt look a lot to me
oh and they quote in there response to the relocation of sparrowhawks in scotland the wise words of prof ian newton who is an expert in the sparrow hawk field
they just forgot to mention he is the chairman of the rspb council
http://www.rspb.org.uk/Images/sparrowhawksandpigeons_tcm9-187597.pdf
http://www.rspb.org.uk/Images/sparrowhawksand%20pigeonsannex_tcm9-187598.pdf