The "toxic" worms that reproduce after being cut have been spotted in Central Texas again after recent heavy rainfall. The invasive species is known as the hammerhead flatworm or hammerhead slug ...

Once again, hammerhead flatworms are wriggling into the spotlight — this time in Canada. The toxic and invasive pests, which ...

Common land planarians are easily identified by their triangular, spade-shaped head. Some can stretch out a foot in length.