From Georgina Skipper, Wyke Regis, Dorset, UK
Reading that crows and magpies, well known as the intellectuals of the bird world, have been using the anti-nesting spikes on roofs as nest-building material, I have to let you know that, near Weymouth, UK, the gulls have been doing this for at least four years (22 July, p 20). Respect!
