large-scale study that we have been running in partnership with the zoological society in london and the rspbased birds. vets opinion to carry out postmortems on birds people have found in their gardens, so we have been able to identify some of the diseases they are suffering from and give advice on how to prevent the spread of those diseases. tells more about the diseases, the prevalence and the birds being affected. one of the main species affected at the moment is greenfinch, and actually people would probably have noticed that we are not seeing as many greenfinches on bird feeders as we used to. we have actually lost over half of our british green french population in the last ten years, it really staggering decline. we know due to our research to a common disease that people might see at bird feeders, bus passengers to each other at the feeders. it can be passed on hygiene is not very good. so we are urging people to be aware of the signs and symptoms of these diseases. so with this one, but might look lethargic and sit on the feeders, they might have food stuck around their beaks, and i