Since 2000, the number of butterflies in the United States has fallen by 22%, on average, researchers report Thursday in the journal Science.Butterfly abundance dropped in every part of the ...

Five butterflies you’ll be lucky to see during Big Butterfly Count - As numbers decline, sightings become more important, ...

“The numbers are low throughout the Upper Midwest,” she said. Monarch butterflies, known for a jaw-dropping fall migration of up to 3,000 miles, have been in decline since the 1990s, due to ...

Since 2000, the number of butterflies in the United States has fallen by 22%, on average, researchers report Thursday in the journal Science.

Butterflies of all kinds of species, in all parts of the country, have declined by one to two percent per year since 2000. Butterfly numbers have fallen by nearly a quarter since 2000 | WWNO ...

Butterflies of all kinds of species, ... Since 2000, the number of butterflies in the United States has fallen by 22%, on average, researchers report Thursday in the journal Science.