Song rate as a signal of male aggressiveness during territorial contests in the wood warbler

摘要: Aggressive signaling is an important component in animal communication, as it provides efficient mechanism for settling conflicts over resources between competitors. In songbirds, a number of singing behaviors have been proposed to be aggressive signals used territory defense, including song rate. Although songbirds has received considerable research attention, adequate evidence most putative not available. this study, we experimentally investigated whether the rate male wood warblers Phylloscopus sibilatrix signal their intent male–male interactions. We found that males responded differentially simulated territorial intrusions depending on intruder. Moreover, continued sing during contests increased rates, and behavior predicted strength escalation by signaler. These results suggest interactions warbler. also high intra-individual repeatability response intrusions, likely reflecting differences personality (aggressiveness) or quality warblers. conclude changes may immediate shifts motivation signalers contests, especially species lack large repertoires simple songs.