Aggressive displays by male House Wrens are composed of multiple components that predict attack

摘要: Aggressive signals should predict whether the sender of signal will attack receiver, yet this criterion has been little studied. We conducted experiments with male House Wrens (Troglodytes aedon )i n north- central Illinois in 2009 to test hypothesis that rates song delivery and wing-quivering (putative aggressive signals) intent. simulated a conspecific territorial intrusion by combining playback taxidermic mount, predicting these would be related male's likelihood attacking conspecific. All males (N = 37) sang response intrusion. Males mount at significantly higher performed more wing quivers than did not attack. In addition, all attacked (9/9), whereas only 53.6% (15/28) so (P 0.011). Our results are consistent both quivering indicate signaler's intent likely components multi-component, hierarchical display. RESUMEN. Los despliegues agresivos de la Ratona Com´ un estcompuestos por m´ ultiples componentes que predicen el ataque Las se˜ nales agresividad deber´ oan predecir si emisor nal atacaral receptor, a´ as´ o este criterio ha sido poco estudiado. Realizamos experimentos en aedon) centro norte fin poner prueba hip´ otesis tasa emisi´ on del canto y temblor alas (se˜ putativas agresividad) nalizan intenci´ probablemente sean despliegue jery componentes.