There are different reasons due to which a building should be protected from bird netting.
1. Airport: Airport all over the world need to be protected from the birds as they can cause huge damage if they crash with
2. Historic Buildings: Historic buildings are an asset to every country. These historic places is a source of revenue for any country. As they can use them as tourism destination. But, birds are able to damage the beauty of such buildings & increase their maintenance cost.
3. Medical Center: Hospital or nurseries providing medical facility should be kept out in getting contact with birds. This can be hazardous to the patient visiting there.
4. Restaurant & Hotel: Restaurant & Hotel business is all about making their customer happy with their services. Though these services are the point of attraction for them they can cause damage to building appearance.