thank you Mr Jason:
Your answer are very useful for me,thanx again

Thank you Jason: The species code I've download before, and I can check every climate zone which species code include, but the species XLS file don't include or describe the total number of species, only have every zone's species, I dont know how can I caculating the tatal number about entire specie...

A confusion question, Althouth I knew that STREETS species code classified by Climate zone(16), Unfortunately, I'd never found the total number about how many those species if ignoring climate zone. because I need to know the total number of Streets species in order to writing thesis aoout STREETS. ...