Monarchs migrate nearly 3,000 miles to Mexico. But with only 2% of their winter habitat left, they're losing their way home. See how reforestation is guiding them back. | Arbor Day Foundation

Monarch butterflies face a serious threat: before the end of this century, the trees they use as a winter haven could be wiped out by the temperature-warming effects of climate change. Luckily, a group of scientists are taking a bold step to save them—moving the trees to an area that will have a more suitable climate in the future in a process known as "assisted migration." But will the butterflies follow? Discover more about this conservation effort: https://on.natgeo.com/3F3Xki9 Host: Jaime Ro