This leech has a scary appetite. But it might be essential to its ecosystem. The largest terrestrial leech in the South, Haemopis septagon, has terrifying eating habits. Yet, its presence in pristine ...

Leeches have evolved a strategy for hunting worms that is the ultimate death spiral.

As we tidy away the Dracula capes and glow-in-the-dark plastic fangs for another winter, one notorious blood sucker has had a particularly good year. In Ireland, the leech was driven to extinction in ...