Noo :( I´m sorry this happened and I´m even more sorry your son saw it... In fact, I saw something similar today. I was working out at one of my favorite outdoor gyms here in Krakow earlier today and suddenly, I saw a squirrel running for her life while being attacked by a huge crow. I chase off the crow and let the squirrel find a shelter on a tree. But I have never seen anything like this and I didn´t even know that crows can attack squirrels. The squirrel was a pretty big, it definitely was an adult specimen. I´m pretty sure the crow wouldn´t even be able to eat it, maybe it was just harassing the poor rodent. It´s weird though, crows are known to be extremely intelligent but I doubt they can be naturally malicious. I believe no animals are. That´s a trait unique to humans only, I would say...
they are capable of even hurting human - we have heard about few incidences here, this world of animals is survival of the fittest - who knows may be one day we will have someone superior hunting us.
So you think that Mr. Hitchcock was onto something back in 1963? :D
https://en.wikipedia.org/wiki/The_Birds_(film)
Yes, it must be real, and even there is cultural beliefs - if a crow touches the head of a human by any chance, then you know your worst days are coming.
That´s an interesting myth. Never heard of it before. Ok, I will be careful :)