I just wondered how long would be a list of birds seen by all BF members added together. In the 8000s?
Or to turn the question round - what birds were not seen by any BF member. Or by no person in the world? Anybody saw Emperor Penguin? Kakapo? Altai Snowcock?
Well, the only way to find out would be for everbody to post a list of what was seen.
Just so long as I don't have to analyse the lists! There have been some BF global bird counts in the past haven't there? What did they tally?