you pick the one u like, a good one is put the bird in four parts, HEAD, BODY, WING, CONDITION, mark each with points, with 10 being the top for each, IE.
head 6, body 7, wing, 5, condition 7, = 25, do this for each bird then go over them and if one has the most points its the winner, u may have to go over some again if they have the same points, as u are looking at a bird u count in ur head the points for the 4 parts and put in the book or ur marker if u have one which is always best, pen so and so 25,