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Figure S1. Outdoor setting. Four large aviaries, each containing a group of three male and three female Gallus gallus. Aviaries were fitted with a coop, plants for cover, and an awning affording shelter from the sun.

Figure S2. Virtual environment. Setup used for individual tests in the anti-predator context. High-definition video audience hen is presented to subject male inside cage (not shown) while a raptor crosses a monitor overhead.

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ETH_1568_sm_ESM_Fig2.psd5461KSupporting info item

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.