Modern North American porcupines are at least twice the size of their southern cousins and have stronger jaws. But how long ...

California condors – known scientifically as Gymnogyps californianus – are imposing vultures. They’re the largest bird ...

Maizey the porcupine at the San Diego Zoo became the first to have a cesarean section in North America after birthing ...

A rare, nearly complete fossil of an extinct North American porcupine helped me and my colleagues solve a decades-long debate ...

Purple martins are migratory birds that breed in Wisconsin and winter in South America. The species relies on human-supplied ...

Emerald ash borers, which destroy North American species of ash trees, were first spotted in Colorado in 2013.

When we walked with a colleague into an aspen forest near Madison, Wisconsin, in the early spring of 2021, we expected to ...

The flowers are insect pollinated, and various thistle species are widely known as important food sources for butterflies, as ...

After years of no signs, black-footed ferrets released into the wild are having wild-born kits in Colorado areas, giving ...

Researchers have discovered an exceptionally preserved fossil site in Massachusetts that provides a rare glimpse into ...

Legislation has been introduced to both chambers of Congress to provide permanent protection for wolves, grizzly bears, and bison and to expand recovery efforts for them.s ...

Sheds light on early Pennsylvanian life. The Wamsutta Formation in eastern North America has a rich variety of ancient ...