Hmm...an unexplained gene in this very attractive bird. And that's evidence of Intelligent Design? I don't see how.
Is it yet to be explained? Perhaps. Is it evidence of ID? Again, it is evidence only that there is a gene unique to this species in that position. Why? Well...more study is needed.
Were I an ID advocate, I'd be just as cautious as anyone about proclaiming this as proof of that odd hypothesis.
Whether or not it is proof doesn't matter much. Some of us don't need proof.