The researchers added the “curious” to the butterfly’s common name because of its uniquely “small population size and high ...

Hidden away in an area of Waterton Lakes National Park, little greyish brown butterflies are now being recognized as a new ...

In the heart of Canada's Rocky Mountains, an unassuming yet remarkable butterfly has been quietly flying under our scientific ...

From 2000 to 2020, the number of butterflies fell by 22% across the continental United States. That’s 1 in 5 butterflies lost. The findings are from an analysis just published in the journal Science ...

The monarch butterfly population in the eastern United States has declined sharply — an estimated 80% loss since the 1990s.

For years, scientists believed the Alberta butterflies were just ... on its limited distribution area and small population, researchers considered the new species to be endangered.

Nine of the 54 butterfly species studied, including the Essex skipper and the silver-studded blue, were the lowest in number since 1992, while the small heath was the highest in number. Over the ...