>rapid evolution of a new species. Not only does it inhabit environments where few insects survive, its environments didn't even exist before a few thousand yea

>rapid evolution of a new species. Not only does it inhabit environments where few insects survive, its environments didn't even exist before a few thousand years ago. the selection pressure which produced the starting population - these were the ones who survived long travels along the trade routes while hiding in the human cargo and after that survived in the new environment (new climate, vegetation, etc) of the destination.