After the first few days of life, the black swallowtail caterpillars’ coloration changes. Their black and white exterior ...

A foul smell is released at the same time, warning predators away.' Several swallowtail species have adopted this unsavoury camouflage for their caterpillars, including the striking citrus swallowtail ...

There are six other common swallowtail butterflies that live in North America. Adult butterflies sip the nectar of milkweed, Joe Pye weed, wild cherry and lilac. Caterpillars happily eat wild ...

Milk parsley had been all but choked out, depriving swallowtail caterpillars of their lunch. Conservationists now recognise the necessity of regular reed and sedge cutting to nurture swallowtails ...