Pennsylvania falls within the defined USDA Northeast region of the U.S.: the western Pennsylvania specific USDA Planting Zone ...

Flowering currant is a classic example of a serviceable American plant that, when transported to different continents, takes ...

A new study has found that overall butterfly populations are declining across the United States. The study, which was ...

4. Hoverflies, like other flies, have a single pair of wings, whereas most other flying insects have two pairs. They also ...

Hummingbirds are on the move back to the United States after spending the winter in Mexico and Central America. Here's how ...