In truth there are many forms of self-aware consciousness in your universe that you do not understand. The intelligent form you have come to know as angels were accepted in the consciousness of humanity long ago. You gave them definition of physical form that was acceptable to your understanding. Humanity had awareness in long-ago times that these beings would pass through in a very short interval of human history or individual experience and therefore you often see the pictures of the wings with angels. Angles really do not have a need for wings.
Angels are beings that have the ability of movement without wings.
Their thoughts take them from one place to the next much as you have the ability to do when you are not in physical form. In ancient times wings were an acceptable definition of angelic presence. If today you see an angel that in your view has wings, one of two things is taking place. You are either translating your experience by your perception of the vibrational form you're seeing, which is often what happens, or that particular being has taken that form to identify its' presence for you in a familiar sense. Children in their open innocence are the most likely to see with clarity the beautiful beings that are always present on your planet.