Abstract
Head-bobbing walking (HBW) and non-bobbing walking (NBW) of black-headed gulls were compared from kinematic and behavioral/environmental viewpoints. The birds walked with a longer stride length and lower stride frequency during the HBW than during the NBW. With respect to these two parameters, the HBW of black-headed gulls was similar to that of other head-bobbers, and the NBW was similar to that of other non-bobbers. The stride length and the amplitude of head bobbing were correlated. These results suggest that the head-bobbing and gait parameters are related. From a behavioral viewpoint, HBW was observed during seeking-type foraging by wading, and NBW was observed during waiting-type foraging on a flat substrate. The type of foraging behavior and/or substrate condition probably determines whether the birds walk with or without head bobbing.
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Abbreviations
- DTT:
-
Distal tarsometatarsus
- HBW:
-
Head-bobbing walking
- MTT:
-
Middle of the tarsometatarsus
- NBW:
-
Non-bobbing walking
- PPT:
-
Proximal tarsometatarsus
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Fujita, M. Head-bobbing and non-bobbing walking of black-headed gulls (Larus ridibundus). J Comp Physiol A 192, 481–488 (2006). https://doi.org/10.1007/s00359-005-0083-4
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DOI: https://doi.org/10.1007/s00359-005-0083-4