Ha, a few. I used to do a lot of rescue work so I'd always end up with the birds that were cage possessive or those "one person" birds. I had a very stubborn and crazy green wing macaw that was never let out of her cage by the person that gave her to me because she was "mean". First week I had her, she was doing really well then decided one day that she did not want to come out of the trash bin she was paying in and she grabbed a hold of the side of my hand and left a nice wound.

I also had a few Amazons and an Eclectus that grabbed fingers and caused injury. I also had a Quaker grab a hold of my cheek and I still have a scar from that. I get bit by everything though. XD