As well as the aforementioned, we have a heron that comes first thing in the morning and frequents the Hayles Street/St Georges Road area. I don't know if someone in the upmarket houses in West Suare has a fishpond but there must be some attraction. I imagine he actually lives in St James Park as he always seem to fly off North. Can't wait for one of the pelicans from there arriving!
There does seem to be more birds (of the garden feather kind) than ever in SE1. I think this may be in part due to the increase in green spaces of later (Bankside Community Trust, Guerilla gardening etc). Have spotted chaffinches, goldfinches, wrens, tits (greater and blue), wagtails, robins, starlings, blackbirds and (no doubt to retuirn shortly) swifts.
Much better than the old SE1 sparrows of yesteryear well, Ok, the mid-90s). Long may it last!