skin tag or polyp in the crease of 12 year old macaws leg

by Nancy
(Damascus, MD)

While my macaw was bathing I notice a skin tag or polyp in the crease of her leg, it is not discolored, nor does it seem to bother her. It has not been noticeable when she is dry, her feathers do cover it but it is polyp shaped and about the size of the eraser on top of a pencil. What could this be?