While it is felt that the species is not threatened by this loss, the researchers said that their reduced numbers left the butterflies vulnerable to future events of weather and disease.
Kuigi arvatakse, et see häving ei ohusta liigi olemasolu, ütlesid teadlased, et kuna monarhliblikaid jäi vähemaks, on nad tulevikus nii ilma kui ka haiguste suhtes ohualtimad.