MESA — Kelsey Shaw and her two children pick up large yellow and green caterpillars just off the Bush Highway near Saguaro Lake. The children have no hesitation handling these nearly 2- to 3-inch-long ...

Cindy Burkhardt had been watching a sphinx moth caterpillar in her garden for several days, but then it disappeared. Soon thereafter, she saw another trundling across a dirt road on Rabbit Mountain.