Pigeon jumps to its death

Many species of non-human animals end their lives through self-destructive or accidental behaviors. But whether it’s an act of suicide is a controversial question.
Animal suicide is a hugely controversial issue in the world of animal research and psychology because although there are numerous documented instances of animals seemingly intentionally ending their own lives, no one is exactly sure whether these cases can technically be classified as suicide. It is nearly impossible to ever tell if any non-human animal knows its actions will result in its own death and performs the actions towards that end...