The Black-billed Magpie
نویسندگان
چکیده
منابع مشابه
Terrestrial locomotion in the black-billed magpie. I. Spatio-temporal gait characteristics.
Spatio-temporal gait characteristics are determined for walking, running, and out of phase hopping magpies, at velocities ranging from 0.4 to 4 m/s. Below 1 m/s, magpies walk. At higher velocities they either run or hop, the latter being preferred. Stride length and frequency during walking and running relate to speed in an identical way. It is suggested that the control of walking and running,...
متن کاملFeather microstructure of the black-billed magpie (Pica pica sericea) and jungle crow (Corvus macrorhynchos).
The jungle crow (Corvus macrorhynchos) distribution stretches from eastern Eurasia continent to southeastern Asia. The distribution of the black-billed magpie (Pica pica sericea) stretches from Korea and China to the Kyushu area in Japan. They are both in the Family, Corvidae, and have iridescent feather colors, but the iridescent feather color of the black-billed magpie is more remarkable than...
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Several experimental results support the existence of costs associated with exaggerated begging behaviour, which are assumed by some theoretical models of honest signalling in parent-offspring communication. However, to understand how honest begging behaviour is evolutionarily maintained in nature, the long-term cost-benefit output associated with exaggerated signals should also be estimated. A...
متن کاملTerrestrial locomotion in the black-billed magpie: kinematic analysis of walking, running and out-of-phase hopping.
The inter-limb kinematic patterns of walking, running and out-of-phase hopping in black-billed magpies (Pica pica) were studied using high-speed video recordings. The flexion/extension patterns of the joints were similar between the gait types, suggesting that the within-leg control of the angular excursions is similar. This result is further supported by the fact that running and hopping are a...
متن کاملRules of Food Allocation between Nestlings of the Black-billed Magpie Pica Pica, a Species Showing Brood Reduction
—Rules of food allocation between nestlings of the black-billed magpie Pica pica, a species showing brood reduction. Aims: The existence of a size hierarchy of nestlings in a brood facilitates a secondary readjustment of brood size to resource availability, through the death of the smaller chicks when food is scarce. A mechanism to facilitate brood reduction would be for parents preferentially ...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1964
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2696