A big year is a personal challenge or an informal competition among birders who attempt to identify as many species of birds as possible by sight or sound, within a single calendar year and within a specific geographic area. Popularized in North America, big years are commonly carried out within a single U.S. state or Canadian province, or within larger areas such as the Lower 48 contiguous states, within the official American Birding Association (ABA) area, or sometimes the entire globe. The ABA big year record of 840 species was set by John Weigel of Australia in 2019.[1] The big year world record of 6,852 species was set in 2016 by Arjan Dwarshuis of the Netherlands.[2]