It's still a bit rainy today, but I felt like looking for Tree Frogs again-- so I went out anyway.  And I'm glad I did!  Along one long farm road, I found three populations of tree frogs.  Two frog communities were somewhat close to each other, while the third was a good 500 meters away.  The neighboring frogs all had brown stripes on their hind limbs, but the frogs in the separated area all had solid green (as pictured here).  It seems the separated group is genetically distinct from the larger group.