I don't have a direct answer to your question, but it reminded me of a Tom Scott video where a library tries to keep a copy of everything you can think of (even stuff like leaflets) because it's not possible to know now what will be relevant/interesting in the future, so it's better to err on the side of keeping more stuff than necessary than to lose things that might be useful in the future. I suck at summarizing, so here's the link to this video:
It's not a native species, but in some German cities, you can see a lot of rose-ringed parakeets. They really stand out between the other local birds, so if you go to places like Cologne or Heidelberg, it's quite likely to spot them, especially since they're so loud. A few months ago, I moved to a city without parakeets and frankly, I miss them a lot.