"I couldn't believe my eyes." The caterpillars are a common sight during Arizona's monsoon season, but this year's brood seems particularly large, said Nico Franz, curator for the Hasbrouck Insect ...

But Dr. Eacock persisted, eventually testing more than 300 caterpillars. First, they tried green and brown dowels. ... older caterpillars with covered eyes were given a choice of dowel colors, ...

They are medium-sized plump green caterpillars with a swollen thorax (the segment right behind the head, which in this case covers the head) sporting two prominent false eye spots used to scare ...

Per Science’s Lakshmi Supriya, Eacock and her colleagues gauged more than 300 caterpillars’ color-sensing skills by placing them in boxes containing wooden dowels painted black, brown, green ...

Two weekends ago, I stumbled upon the most intriguing caterpillar I've ever seen — that of the Eastern Tiger Swallowtail butterfly. I briefly mistook the emerald green caterpillar for a leaf ...

PHOENIX — Bobbie Frink could not even step out of the car. Outside, thousands of fat, green caterpillars wriggled and writhed their way across the street near her home in Ahwatukee last week ...

About 275 future butterflies spend their days munching on blades of prairie grass. The tiny green caterpillars are now 8 millimeters long and barely visible. The hoop houses aren't open to the public.

A friend took this picture in a parking lot. The caterpillar is about three inches long and grabbed hold of the pavement tightly when my friend tried to move it. Can you identify it? If you wondere… ...