What about a green anole/brown anole hybrid.
I don't believe that such a hybrid is possible despite the fact that they are of the same genus. Apparently there have been documented matings between the two species, and the eggs have all been infertile.
Yeah, when you talk about the genetic difference between two even seemingly closely related species, it's really hard to tell how similar or different they actually are without looking at the DNA itself. Classifications of species are changing all the time and have been historically based on many different, often incorrect, criteria. Even today, there really isn't a set definition of a "species" that fits all cases. Even if the genetic similarity is there, there are also many other barriers to natural hybridization be they geographical, behavioral, anatomical and so on.
Very true.

Sorry, I couldn't resist.