Conservationist’s faced a crushing blow last month as two butterfly species native to Florida were declared extinct.

“Occasionally, these types of butterflies disappear for long periods of time but are rediscovered in another location,” said Larry Williams, U.S. Fish and Wildlife state supervisor for ecological services. We think it’s apparent now these two species are extinct.”

Neither species has been seen in any environment for at least nine years, the latter of the two not being seen since 2000.