Attract the elegant zebra swallowtail butterfly to your yard by growing nectar plants. Also discover the host plant for the caterpillars.

This Swallowtail butterfly has multiple pairs of legs as a caterpillar, but they look completely different once it undergoes metamorphosis.

Did you know that caterpillars come from butterfly eggs? See pictures of butterflies laying eggs on their host plants.

Here is the list of most breathtaking and beautiful butterfly species in the world. The black swallowtail, also known as the eastern black swallowtail or American swallowtail, has black wings ...

Swallowtail caterpillars are green once they grow large Kerry Calloway, who helps manage the tropical butterfly house, says, 'When they are resting on top of a green leaf, they look just like bird ...

Many Delaware groups, including conservation organizations, state agencies and Sen. Stephanie Hansen, D-Middletown, are ...