I just found the following web site. I will have to start reporting and using it for invasive species monitoring: There is a lot of data on these maps about where invasive species are found right now.

EDDMapS - Early Detection and Distribution Mapping System

Invasive Species Mapping Made Easy!

  • Real time tracking of invasive species occurrences
  • Local and national distribution maps
  • Electronic early detection reporting tools
  • Library of identification and management information



Japanese Stiltgrass (Microstegium vimineum) photo by Mike Slater

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