(1) Seen for my lifelist, but I note heard-only as well so I can give a full list. For my Dutch list, heard-only counts as well (indeed to prevent disturbance) - I have four heard-only birds on my Dutch list, one of which is not on my life list...(1) do you count only SEEN birds for your lifelists or do you include HEARD species as well? Is there some internationally established "code of ethics" for this matter?
(2) does the number of photographed species play any role in your lifelists, or do you only count seen birds? Or seen and photographed separately?
(3) and, lastly, do you guys have some centralized birder's list/database in your home countries/regions? If yes, could you comment briefly on how that is organized?
(3) The Dutch ranking is here: https://www.dutchbirdalerts.nl/ranking, although not everyone takes part. A few more may be extracted from https://waarneming.nl. The Belgian list is here: https://www.belgianbirdalerts.be/ranking