vic.gedris.org Never mind the blogs, here's the website.

I hate to break it to you but your "research" involving pigeons disease is way off. My father is losing vision in both eyes because of histoplasmosis that he acquired as a child playing in his grandfather's pigeon coop. Histoplasmosis is a common fungus to come in contact with, but can be dangerous in high quantities. Research has shown that the histoplasmosis thrives in pigeon droppings. While it may not be dangerous in small quantities, if you turn your balcony into a de facto pigeon coop, you may be at risk too. Remember that these birds are only natural to Europe, Northern Africa and Western Asia, if you live outside of these areas and shelter these birds, you are helping to support a pest that is displacing the natural fauna of the area.