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).
2017
1974
2020
1975
2019
2011
2014
2013
2008
1965
2009
2004
2010
1992
1976
2003