Hello everyone~ Bird feeder from London

Hi everyone,

I am new here. I live in London city, but not next to the main road. I want to keep bird feeder in my balcony, however I am worry if it may be disturbing my neighbors such as building a nest. Can you please give me some advice? How do I know if any bird flies around my area? 

I aims to give bird feeder and fresh water in summer. 

Thank you.