An airline passenger discovered the a frog perched on a slice of cucumber while on a Qantas flight from Melbourne to Wellington in February. “Naturally there was a bit of consternation by the passenger who called back the attendant,” Ministry of Agriculture and Forestry quarantine general manager Fergus Small said.  The flight attendant removed the salad and the 4 cm (1.6 inch) whistling tree frog, which was killed by quarantine staff when the aircraft landed.  Qantas was not immediately available for comment but a spokesman told The New Zealand Herald newspaper the airline had since changed its lettuce supplier and introduced “additional procedures into the salad supply process.”