I did not realize that this site was developed to demonstrate our educated vocabularies.I was only asking a question related to songs rather than academic discussion. I agree that metamorphosis is much more aptly applied to zoological processes. I used shape-shifter as that seems to apply to Navajo and Inuit legends also;I thought it might be more open-minded and cross-cultural.As one of the best musicians I have ever known could not read or write,I was looking for all types of people to contribute.