Haddad on monarch butterflies making an endangered list

The monarch butterfly fluttered a step closer to extinction Thursday, as scientists put the iconic orange-and-black insect on the endangered list because of its fast dwindling numbers.

"It's just a devastating decline," said Stuart Pimm, an ecologist at Duke University who was not involved in the new listing. "This is one of the most recognizable butterflies in the world."

The International Union for the Conservation of Nature added the migrating monarch butterfly for the first time to its "red list" of threatened species and categorized it as "endangered" "€” two steps from extinct.

The group estimates that the population of monarch butterflies in North America has declined between

22% and 72% over 10 years, depending on the measurement method.

"What we're worried about is the rate of decline," said Nick Haddad, a conservation biologist at Michigan State University. "It's very easy to imagine how very quickly this butterfly could become even more imperiled."

Haddad, who was not directly involved in the listing, estimates that the population of monarch butterflies he studies in the eastern United States has declined between 85% and 95% since the 1990s.

In North America, millions of monarch butterflies undertake the longest migration of any insect species known to science.

The United States has not listed monarch butterflies under the Endangered Species Act, but several environmental groups believe it should be listed.

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