☆ 4.0 Article

Yawning in wild Indo-Pacific bottlenose dolphins (Tursiops aduncus)

MAMMAL STUDY (2023)

Observation of yawn-like behavior in a dugong (Dugong dugon)

Akiko Enokizu et al.

Summary: A captive dugong exhibited yawn-like behaviors, occurring more frequently during resting states. These behaviors may be associated with drowsiness.

JOURNAL OF ETHOLOGY (2022)

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Article Psychology, Biological

Yawn-like behavior in captive common bottlenose dolphins (Tursiops truncatus)

Akiko Enokizu et al.

Summary: Yawning is an involuntary action observed in a variety of vertebrate species, including dolphins. The yawn-like behavior exhibited by dolphins was found to occur during inactive periods and may serve to increase their arousal level, similar to the function of yawning in terrestrial animals.

BEHAVIOURAL PROCESSES (2021)

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Article Multidisciplinary Sciences

First evidence of yawn contagion in a wild monkey species

Alessandro Gallo et al.

Summary: Yawn contagion occurs in wild geladas, with individuals responding most strongly to triggering yawns. Factors like yawn duration and mouth-opening degree do not affect contagion likelihood, while group membership and responder sex play a significant role in shaping the phenomenon.

SCIENTIFIC REPORTS (2021)

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Article Multidisciplinary Sciences