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).
1990
1991
2010
1957
2013
2019
2023
1988
2022
1953
2017
2014
2009
2007
2006
2005