Anita

I was given a parrot yesterday from a pet supply store. (They do not deal with birds) He was given to them by someone who only had him for 6 weeks. I was told that it is a 5 1/2 year old male conure. Other than that I know nothing about him. I searched the internet and have not been able to find a picture of him. I am at least his third owner. He came to me with no feathers on his back, chest, belly or legs. The feathers that he does have left are green with a red head. I would like to know what he is and what his dietary requirements are. I am not familiar with parrots. I have only have budgies and cockatiels. I am attaching a picture. I know it's not a very good picture.
Any help would really be appreciated.
Thank you
Anita