Monarchs may be rebounding, but they're definitely not out of the woods.

The Mexican government just announced that the area occupied by the butterflies during their winter migration rose 69 percent over the past year, representing an increase of around 23 million monarchs. That's still way down from a decade ago, though, and the second-lowest count on record, largely due to the loss of milkweed, which monarch larvae rely on for food. A single winter storm, like the one that devastated monarchs in 2002, could easily wipe out the entire remaining population. Washington Post