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• W3175897223 abstract "In several animal species, including birds, individuals are known to produce low‐frequency vocalizations during aggressive interactions with conspecifics. In this study, I investigated territorial interactions between male Eurasian Scops Owls Otus scops that occupied territories in a densely packed area. The single‐note hoot of the Scops Owl is generally thought to be highly repeatable; however, extensive recording of male–male interactions identified previously unrecognized variation in the structure of hoots. Male Scops Owls gave hoots at a frequency lower than usual when engaging in short‐distance contests with neighbouring males. Within‐subject analysis revealed that the caller’s average hoot frequency was positively correlated with the distance from its rival. During contests, males gradually reduced their hoot frequency as they approached one another, perhaps reflecting changes in the degree of escalation. Furthermore, there is evidence that male Scops Owls have voluntary control of their hoot frequency also on a very short time scale. Males gave deeper hoots immediately after the rival initiated countersinging, and returned to their usual frequency range at the end of the interaction. This study confirms in part the findings of other authors’ experimental work, where male owls adjusted their vocal frequency when challenged by an opponent. However, that study suggested that vocal frequency would encode information about the caller’s bodyweight. In contrast, the results of the present study cannot exclude the hypothesis that the hoot of the Scops Owl is a variable, conventional signal that reflects the willingness to escalate the conflict. The reliability of the signal could be maintained by the risk of retaliation by the opponent, usually located a few metres from the caller." @default.
• W3175897223 created "2021-07-05" @default.
• W3175897223 creator A5060319739 @default.
• W3175897223 date "2021-07-17" @default.
• W3175897223 modified "2023-10-06" @default.
• W3175897223 title "Pervasive low‐frequency vocal modulation during territorial contests in Eurasian Scops Owls (<i>Otus scops</i>)" @default.
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• W3175897223 doi "https://doi.org/10.1111/ibi.12989" @default.
• W3175897223 hasPublicationYear "2021" @default.
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