The monarch butterfly begins its life in a cream-colored egg attached to the underside of a milkweed leaf. A worm-like larva grows inside the egg, and when it is ready to emerge, the larva chews a ...

RIO GRANDE CITY, Texas— The U.S. Fish and Wildlife Service today protected the prostrate milkweed as endangered. Only 24 populations of the plant survive, in south Texas and northern Mexico, where ...

Tom Wirt pointed to a cluster of blue blossoms in his back yard and said, “That’s the key to monarchs.” The butterfly, that is, as monarch caterpillars eat milkweed exclusively. This ...