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).
1975
1991
1999
2014
2021
2010
2023
1986
1971
2000
2022
2017
1978
2024
2009
2019