A larva of swallowtail butterfly Papilio xuthus changes its body pattern at the 4th molt. The juvenile larva […] Photos: Caterpillar transforms from mimicking bird droppings to a leaf Photos: ...

wiljoj / Getty Images. Found in the forests of India and southeast Asia, in its larval state, the red Helen swallowtail caterpillar looks like an ominous green snake.

The pipevine swallowtail caterpillar feeds exclusively on pipevine plants that contain active aristolochic acids, which the caterpillars hold in store for their butterfly selves to use as a ...

A photo of a swallowtail caterpillar in parsley, a Woodsy Owl anniversary, poor outlook for Wisconsin wild rice and an ID of the Chicago River loach are among the notes from around the Chicago ...