text: I'm aware of vernal pools. I'm just not aware of a widely accepted way to tag them. There's 17 uses of wetland=vernal_pool, but it doesn't have a wiki article, there isn't defined, and I wouldn't be surprised if there isn't a better tag for them out there that I'm just not aware of. Since I doubt no one has mapped any of them before. 
  
  Also, I wasn't calling wetlands becoming bone dry in the dry season oxymoronic. Obviously that's something that happens. What I said is oxymoronic is using the intermittent with the natural=wetland tag since the current definition of a wetland on the Wiki requires the area to be saturated with water. That's not necessarily my personal opinion about wetlands, but I still think the broadly accepted definition should either be respected or clarified to include seasonally dry wetlands  instead of just tagging these areas as wetlands and calling it good. That's all. If you ground truth them that would help a lot, but more research as to the proper tagging conventions would be good also. 