How you manage your life list is largely up to you. With that said, there are always gray areas.
I do not include zoo birds or any other captive bird in my lists as a general policy. With this policy I was still presented with a quandry. I visit our local bird banding station (Idaho Bird Observatory) two or three times each year. In this case I did not find the bird myself, but the bird was wild in that particular location. My observation was simply assisted by the experts and the netting process. I did not originally include these birds but I have started doing so.
So my policy has evolved to be birds that are wild and arrived in the location at least mostly in a natural way. I don't count peacocks in a captive pen, but I do count introduced species that have become wild such as the Ring-necked Pheasant.
Rob Miller
Blog: http://wolf21m.blogspot.com/