There's a lady who comes to Trafalgar Square every lunchtime with a bag of seed to feed the pigeons. The pigeons clearly know her well and get quite excited as soon as she arrives. She gives seed to anyone who wants to feed the pigeons themselves. The pigeons will happily sit and eat out of your hand. This young American tourist was a bit apprehensive at first but was soon giggling as the pecking beaks were tickling his hand !