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 ...

Springtime has arrived in Imperial Valley, a region renowned for its agriculture, and with it comes the vibrant bloom of ...

The plight of the monarch butterfly could cost farmers a valuable tool in the fight to protect crops from weeds and pests. An ...

Watch a Monarch caterpillar go through metamorphosis and become a gorgeous butterfly. In this awe-inspiring timelapse, we see ...

In mid-November, swirling orange-and-black clouds appear in the skies above the Monarch Butterfly ... insect unpalatable to predators. The researchers compared each butterfly’s carbon and ...

That cost may be worth it for monarch butterflies because the benefit of being noxious to predators is so much more valuable, Whiteman says. Tina Hesman Saey is the senior staff writer and reports ...

The peak of the spring monarch butterfly migration in Texas typically occurs from late March to early April. See where on ...

In a turn of events, the eastern monarch butterfly population — which was put on the list of endangered species just a few years ago — nearly doubled this year, according to a March report ...

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 ...