I don't know but when I lived in New England everything was a pond. There was a reservoir there of 25,000 acres and many of the locals referred to it as Quabbin Pond. Yeah right!

I think this may be one of those subjective things. To me the cutoff is about 25 acres but that's just me.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.