The problem of invasive species is recognized as a significant threat to everything from global biodiversity to maintaining ...

Across the globe, the problem of invasive species ... They move in on boat anchors and motor homes. They hitchhike on/in packing materials. They stick to the bottom of your hiking boots.

"Adult snakes and lizards are just the tip of the iceberg," said Prof William Sutherland, of the University of Cambridge. "If they're getting through, what's the chance of us spotting small insects ...

These "hitchhiking intruders" have included a tree frog that emerged from roses at a florist's shop in Sheffield and snakes discovered in ornamental olive trees shipped across mainland Europe.

Paula Kornell is the daughter of Marilouise and Hanns Kornell. After growing up in her father’s winery and working there, she went on to run several wineries in Napa and Sonoma. She’s served as chair ...