Stories about: invasive species  

Hundreds of amateur hunters have signed up for the challenge

The Python Challenge will take place in 2013, promises a $1,500 first prize

The creatures feed on local vegetation and crops, might be carrying diseases

This invasive species is argued to risk the health of humans and native species

Researchers are now concerned about the status of this invasive species in Florida

Their natural habitats are the areas around hydrothermal vents

Increased numbers of expeditions to the continent are most likely to blame

The insects don't seem too intent to conclude their vacation

All species researchers found in a new study are invasive