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

The population wintering in central Mexico's forests occupied 4.42 acres, up from 2.22 acres during the previous winter.

What sounded like leaves rustling in the wind was the flickering wings of thousands of monarch butterflies as they flitted ...

The number of monarch butterflies wintering in the mountains west of Mexico City rebounded this year, doubling the area they ...

Say the word “butterfly” to any younger Generation Xer, millennial, or older Zoomer, and any number of songs may immediately ...

A study, published Thursday in the journal Science, found that 22% of butterflies in the United States disappeared between ...

This year’s count of 4.42 acres of occupied forest habitat is nearly twice as large as last year's, but eastern monarch butterfly populations remain ... Monarch butterflies face several threats: ...