I haven't grown Nicotiana sylvestris for a couple of years but its seedlings pop up occasionally - usually somewhere I really can't leave it, like the middle of a gravel path. Love it :) Maybe sometime I'll make a garden that can have them (and Verbena bonariensis) in places they really aren't supposed to be... My childhood geekdom was the Oxford book of insects. Can't recognise them now though... must have just liked looking at the pretty pictures!