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

A zebra and giraffe poked their heads through a tourist's car window to ask for carrots. Footage shows the animals at the safari zoo taking turns to eat vegetables from the visitor's hand in ...

Aside from two waterfleas, the invasive species living in Lake Erie are very similar to those taking over the rest of the ...

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

The animal kingdom is a beautiful place, packed to the brim with diversity. One of the most iconic symbols of the animal ...

As festivals honor the pawpaw's rich taste and texture, researchers explore its potential to support regional agriculture.

Quagga mussels have been documented in Geneva Lake in Walworth County, the first finding of the aquatic invasive species in a ...

In a new study, scientists created a top 10 list of the worst invasive species in the Great Lakes. The team of scientists ...

mostly by causing a lack of zooplankton for young perch to eat. But the quagga is known to many as the "bigger and badder" cousin of the zebra. In recent decades in North American waters the ...

If the ocean has a bogeyman, its calling card is biting fish in half before anglers can reel them into the boat. The phenomenon is called depredation, and it’s at the core of a research project that ...

Katherine Rundell said children can handle hefty themes, but finds it “bad manners to offer a child a story and give them ...

Blue-green algae is known to emit toxins which can cause skin irritation in humans, or stomach upsets if a lot of affected ...