[_y5hn]

We simply put up post it stickers where birds usually crashed in our windows. There's way less crashes and dead birds after that.

Think how many birds crash during a year, and how many houses and buildings with windows there are.

You can also buy bird stickers to put up.

[throwaway290]

Harder to do with one of those glassy skyscrapers. the ugliest and probably the deadliest for birds kind

[aziaziazi]

What is hard about it? They rope themselves everywhere around it to clean it up. Even a basic robot can put stickers. An even easier and cheaper way is to require it for new constructions.