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.

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: ...

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

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 ...

Biologists from Texas Parks and Wildlife are warning of some of the consequences people could face if the butterfly ...

One of the most striking examples is the monarch butterfly ... vulnerable species and ensuring butterfly populations remain resilient in the face of ongoing environmental changes.

FILE - A Monarch butterfly rests near a stream at Piedra Herrada sanctuary ... according to a study in Thursday’s journal Science. Experts say that monarchs face risks across North America in large ...

FILE - A Monarch butterfly rests near a stream at Piedra ... Experts say that monarchs face risks across North America in large part due to the reduction in milkweed where the monarchs lay their ...