In 2016, Dutch birdwatcher Arjan Dwarshuis traveled the world to spot as many birds as possible in the span of one year, with the goal to break the big year world record (6042 species, set by Noah Strycker in 2015).
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1999
2013
2017
2016
2015
1963
1965
1966
2000
1933
1998
1980
1970
1960