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Why Some Birds Are More Cautious Than Others

An international study involving the Austrian Academy of Sciences has found evidence that ecological conditions closely shape curiosity and caution in animals, and that wariness toward novelty—known as neophobia—has deep evolutionary roots.

19.11.2025
Two small blue and rust-colored birds perch on opposite sides of a tree stump, facing each other.
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While some birds are bold and inquisitive, others keep their distance. An international collaboration involving 129 researchers from 77 institutions in 24 countries, including the Austrian Academy of Sciences (OeAW), has, for the first time, systematically examined why animals differ in their susceptibility to new situations. The findings show that neophobia not only shapes individual behavior but is also deeply embedded in evolutionary history.

The study drew on the ManyBirds Project, a globally coordinated “big team science” network, and examined 1,439 birds from 136 species across six continents—from laboratory settings to field sites and zoos. Researchers measured how long birds hesitated to touch familiar food when a novel object was placed nearby, compared with a control condition without the object. The results were recently published in the journal PLOS Biology.

Read the full article in German here

ManyBirds Project

Marisa Hoeschele

Publication

“A large-scale study across the avian clade identifies ecological drivers of neophobia.” ManyBirds Project, Rachael Miller, (…), Marisa Hoeschele et al.,  PLOS Biology
DOI: doi.org/10.1371/journal.pbio.3003394