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Why did the chicken cross the road? Because it was daring, but a bit dim

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French researchers say free range chickens that stick close to the coop are more anxious and timid, but also more perceptive and intelligent, than their further-roaming birds of a feather - no yolk! Home-body hens that were more nervous about coming out of their shells were much better at cracking problem-solving tests than bolder birds, whose brains were scrambled by the tasks the scientists set. They say this level of behavioural complexity and impulse control is similar to that observed in monkeys.

Journal/conference: Biology Letters

Link to research (DOI): 10.1098/rsbl.2019.0721

Organisation/s: Yncréa Hauts-de-France, France

Funder: Yncréa Hauts-de-France and the French National Institute for Agricultural Research (INRA).

Media Release

From: The Royal Society

Uninhibited chickens: ranging behavior impacts motor self-regulation in free-range broiler chickens (Gallus gallus domesticus)

Chicken chicken: Free-range chickens that stay close to the coop tend to be more anxious, timid—and perceptive. These qualities may explain why they outperformed their far-roaming counterparts in problem-solving tests set by researchers. The study suggests this relationship between a chicken’s personality, its tendency for exploration, and its cognitive performance, may demonstrate a level of impulse control comparable with some species of monkey.

The present study investigated how different ranging patterns in free-range chickens influence behavioral inhibition, mainly motor self-regulation. We showed that high levels of ranging behavior have a negative impact on behavioral inhibition, with high ranger chickens showing the worst performance of all species tested thus far. Low ranger chickens, however, attained higher levels of inhibition comparable to those of some monkeys and prosimians. This is the first demonstration to our knowledge of a relationship between exploratory tendencies and motor self-regulation for an avian species and gives further support to the impacts of individual behavioral differences on cognitive performances. 

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