To access food sources or defend the territory,agonistic behavior,mostly in a form of ritualization,was frequently displayed.
为获得食物和保卫领域,黑颈(或与灰)常发生争斗,争斗的主要形式是式化威胁。
To access food sources or defend the territory,agonistic behavior,mostly in a form of ritualization,was frequently displayed.
为获得食物和保卫领域,黑颈(或与灰)常发生争斗,争斗的主要形式是式化威胁。
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