America, Know Thyself

I was reading this article in the NYTimes about the possibly extinction of the trees used to make ash baseball bats when I came across this interesting tidbit:

Still, the emerald ash borer, or Agrilus planipennis Fairmaire, is the most immediate threat. Discovered in the United States near Detroit in 2002, the beetles, which are shiny green, will destroy a tree in two to three years. The larvae tunnel inside the trees, cutting off water and food.

Wait wait... a new insect species was discovered in Detroit in 2002? It seems a little crazy that in a super-advanced nation such as ours, we still don't know all the species in our own borders.