Monarch butterflies are poisonous to predators because of the chemicals in the milkweed they eat as caterpillars. In just the 9 to 14 days of the larval stage, a monarch caterpillar can grow to 2,700 ...

The eastern monarch butterfly population nearly doubled in 2025, but the numbers remain far below the long-term average.

The monarch butterfly is easily identified by its bold orange, black and white coloring. This fascinating insect goes through an amazing life cycle consisting of four stages: egg, larvae ...

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

Monarch butterflies—including western monarchs ... in monarch spring arrival times—if one existed—affected how the larvae developed. One group was placed two weeks earlier than the monarchs ...

Monarch butterflies -- including western monarchs ... monarch spring arrival times -- if one existed -- affected how the larvae developed. One group was placed two weeks earlier than the monarchs ...

National Plant a Flower Day is all about celebrating the beauty of flowers. Planting them can also help save pollinators like ...

Monarch butterflies – including western monarchs ... spring arrival times – if one existed – affected how the larvae developed. One group was placed two weeks earlier than the monarchs ...