Attached Link: http://www.nsf.gov/news/news_summ.jsp?cntn_id=100868&org=NSF&from=news

song sparrow. never heard them though..I'd love to. London isn't exactly that bird friendly..though I'd sneakily feed the pigeons in front of New Scotland Yard's building!  Nah..never got caught.. would just smile at the security guards..and I'm sure everyone fed the birds... another site says a sedge warbler [blx1.bto.org/birdfacts/results/bob12430.htm](http://blx1.bto.org/birdfacts/results/bob12430.htm)  . That's more a UK bird..so that may be the one you looking for.. is there one pottering around close by home?