A study compiled data from more than 76,000 butterfly surveys across the continental U.S. The declines seen in the last 20 ...

The Trump administration said Tuesday that it is reconsidering adding protections to the monarch butterfly as a threatened ...

The Trump administration is reopening public comment on a proposed rule that would list the monarch butterfly as threatened ...

Just a few years ago, the eastern monarch was considered endangered by the International Union for Conservation of Nature ...

The U.S. Fish and Wildlife Service is opening a second comment period as they work to list the monarch butterfly on the ...

The number of monarch butterflies overwintering this year in Mexico has nearly doubled, according to the annual census data ...

Butterfly populations have dropped by 22% in the United States, according to a new study published Thursday in the journal ...

A team of scientists combined 76,957 surveys from 35 monitoring programs and blended them for an apples-to-apples comparison ...

These late-blooming plants native to North America help feed butterflies — especially monarchs-— at a crucial point.

The study included monarch butterflies. But because the clearest evidence on their numerical declines comes from their ...

During the spring and summer, butterflies will begin to either emerge from chrysalis or begin migrating. Here's when to see butterflies in Louisiana.

This year’s count of 4.42 acres of occupied forest habitat is nearly twice as large as last year's, but eastern monarch ...