Destruction of the food source is one of major causes of the population drop, as mentioned in the linked article. It also mentions storms being able to wipe out

Destruction of the food source is one of major causes of the population drop, as mentioned in the linked article. It also mentions storms being able to wipe out millions. Even if there’s 100x as much milkweed next year as there is this year, it terrifies me that a forest fire or something could easily wipe out such a small population today and that’s the end of the line.