Scientists say frog’s journey shows difficulty of spotting insects or fungi spread by global plant trade

A tiny tree frog hitchhiking in a bunch of roses to Sheffield from Colombia has inspired a study into invasive species reaching the UK’s shores.

Dr Silviu Petrovan, a researcher in the University of Cambridge’s zoology department and a senior author of a paper published today in the journal BioScience, had his interest piqued when he was asked to identify a live frog found in roses in a florist’s shop in Sheffield.