Ra says:
“We seek the Creator upon a level of shared experience to which you are not privy and rather than surrounding ourselves in light we have become light. Our understanding is that there is no other material except light.” #64.6
“We ourselves, when we chose a mission among your peoples, needed to study your peoples for had we arrived in no other form than our own, we would have been perceived as light.” #8.20
In the above two quotes, Ra gives some indication as to their native form, that being, light. Thus if the student of the material would find it helpful to visualize Ra, even though Ra would likely emphasize that it is not they but the Law of One which is of importance, then one would do well to visualize light in some form or another.
Elsewhere Ra indicated that when they made themselves visible to those we know of as the ancient Egyptians, Ra had a particular appearance:
“I am, with the social memory complex of which I am a part, one of those who voyaged outward from another planet within your own solar system, as this entity would call it. The planetary influence was that you call Venus. We are a race old in your measures. When we were at the sixth dimension our physical beings were what you would call golden. We were tall and somewhat delicate. Our physical body complex covering, which you call the integument, had a golden luster.
In this form we decided to come among your peoples. Your peoples at that time were much unlike us in physical appearance, as you might call it. We, thus, did not mix well with the population and were obviously other than they. Thus, our visit was relatively short, for we found ourselves in the hypocritical position of being acclaimed as other than your other-selves.“ #6.4
These are the most specific remarks regarding Ra’s visual appearance. Nowhere in the 106 sessions of the Ra contact did they indicate any specific association with the color blue or avian traits.
They are also clear that their other-than-human appearance caused the locals to see Ra as something categorically different. This was not Ra’s intention and it proved counterproductive to their humble mission of service, thus they needed to discontinue their onsite efforts.