Quote Originally Posted by PeteJ View Post
I think when they use the term 'morph' in this case it is short for morphology, in other words: 'One of various distinct forms of an organism or species.' And, regardless if it is a Harlan's or a RT, it is dark and therefore a dark morph. There are light morph Harlan's, although when I think of Harlan's I must admit to thinking that the normal plumage is dark and the lighter plumage is probably the lesser known. Much like the dark plumage is not average for an RT.
Morphs must occupy the same habitat at the same time: this would exclude geographical species such as the Harlan's. I believe you are confusing the Harlan's with what is commonly called a "Dark Morph RT".

Morph is not short for Morphology,
It is actually a Greek word meaning Form. But if you add the Greek word Logos meaning Study, I guess you do end up creating Form+Study (Morphe+Logos) = Morphology.