The Blond Titi Monkey, aka Barbara Brown's Titi Monkey, is a species of titi monkey endemic to northeastern Brazil. It is estimated that less than 250 individuals remain. This market will resolve YES if the Blond Titi Monkey is declared extinct by the IUCN by 2100 or earlier, and NO if it is not declared extinct by the IUCN in 2100.
Wikipedia
https://en.wikipedia.org/wiki/Barbara_Brown%27s_titi_monkey
IUCN Red List of Threatened Species Assessment: Critically endangered
https://www.iucnredlist.org/species/39929/191703041
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According to an estimation from 2023 there were 873 individuals in Chapada Diamantina National Park https://www.speciesconservation.org/case-studies-projects/blond-titi-monkey/27289