G rowing milkweed is one of the most rewarding actions a gardener can take to support monarch butterflies. Monarchs rely on milkweed as the sole host plant for their caterpillars, and without it ...

Although each monarch only migrates once, it can find the exact overwintering groves its ancestors used, probably using magnetism and sunlight to help it navigate. Monarch caterpillars eat 200 times ...

The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in ...

“The iconic monarch butterfly is cherished across ... has warned that as the planet warms, milkweed could shift toward the poles to find more conducive growing conditions. That could force ...