A small (like a chubby sparrow) bird came to my balcony (city centre, but with lots of trees near by). It had a black "hat" and very white belly and a black stripe like a tie down it's front. It may be young. It's feathers looked quite downy when the wind ruffled them. It was eyeing some bread crumbs and hopping from the bamboo fence to the rims of plant pots but did not come down for the crumbs while I was watching.