There are ravens in the Tower of London.
Which may not sound that remarkable, but the reason it’s sort of weird is that ravens (Corvus corax) almost do not exist anywhere else in the British Isles. They were largely exterminated over a century and a half ago when it was thought that they killed baby livestock. Ravens cannot do that. They cannot kill a healthy newborn calf, but they are carrion eaters, and when a farmer would walk out and find a dead baby calf with ravens pecking out its eyes, he would come to the wrong conclusion. Unjustly accused, the ravens, after co-habiting with the English for many centuries, suddenly, due to some inexplicable turn in public opinion, became pariahs, victims of prejudice, and a great cleansing ensued. A raven genocide swept across the English landscape, and as firearms became more widespread, their fate seemed sealed. What saved them is that ravens are corvids, and can learn and teach, and they quickly started avoiding humans, and teaching their young to do the same. Nowdays, they only exist in the highlands and the outlands, nowhere near human habitations.