Another possibility is that it is a historical or cultural story. In some cultures, butterflies in general, and black ones specifically, can have different meanings. It could be a story passed down through generations that involves black butterflies as an important element, such as in a tribal legend where they are seen as messengers from the spirit world or as a sign of an impending event.
It could also be a more symbolic or metaphorical story. For example, black butterflies might be used to represent something dark or mysterious in a human experience. Maybe it's a story about a person's journey through difficult times and the black butterflies are a recurring symbol that represents their internal struggles or a sense of foreboding.
The 'Black Butterflies True Story' could be about various things. It might be a story related to black butterflies in nature, perhaps their unique life cycle, migration patterns, or their significance in a particular ecosystem.