A quarantine has been issued "to help businesses and homeowners recognize the insect, learn how to control it, and keep it ...

Explore daily insights on the USA TODAY crossword puzzle by Sally Hoelscher. Uncover expert takes and answers in our ...

Although its host plant is native to Pittsburgh, no sightings of zebra swallowtail butterflies had been reported in 87 years.

I watched the butterfly flit from marigold to zinnia to fall mums, feasting on the nectar the blooms provided. A closer look ...

A butterfly species not logged in Pittsburgh since 1937 had reappeared, thanks to enthusiasts for a native fruit tree, and warming weather.

Debate night in Ottawa — and Nanaimo.