Two potential signals used during male-male agonistic encounters were examined for signal content in the territorial agamid lizard Ctenophorus decresii, or tawny dragon. Males have black chest patches, which are apparent when they posture during agonistic encounters. Patches are not condition or size dependent. The area of the patches is positively associated with levels of aggression and likelihood of winning a fight. The patch thus functions as a 'badge of status' indicating male aggression....[Show more]
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