Scientists used 'fake news' to stop predators from killing endangered birds and the result was remarkable. The number of nests destroyed by predators almost halved and chick production was 1.7 times higher at treated sites compared to control sites.

Full text of study: 'Misinformation tactics protect rare birds from problem predators' https://advances.sciencemag.org/content/7/11/eabe4164

From the abstract:

Here, we show that sensory misinformation tactics can reduce the impacts of predators on vulnerable bird populations as effectively as lethal control. We repeatedly exposed invasive mammalian predators to unprofitable bird odors for 5 weeks before native shorebirds arrived for nesting and for 8 weeks thereafter. Chick production increased 1.7-fold at odor-treated sites over 25 to 35 days, with doubled or tripled odds of successful hatching, resulting in a 127% increase in modeled population size in 25 years. We demonstrate that decision-making processes that respond to changes in information reliability are vulnerable to tactical manipulation by misinformation. Altering perceptions of prey availability offers an innovative, nonlethal approach to managing problem predators and improving conservation outcomes for threatened species.

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