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).
2018
2017
2004
2015
2014
2019
1959
1960
2008
2006
2001
2009
2003
2007
1951
1928
2002
2005