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Vocalizations of H. Dominant call frequency was inversely correlated with male length and body mass but not with environmental temperature. Number of pulses per note was not correlated with any variable, and advertisement call amplitude was influenced by temperature and time. During chorus aggregation, males interacted acoustically by emitting advertisement calls in antiphony, or by emitting aggressive calls. Some disputes among males culminated in physical combat; males performed kicks and slaps on rivals' heads, in an apparent attempt to dislodge rivals from perches.
Visual signals were also displayed during conflicts between males, contributing to an escalation of aggressive behavior.
Visual signals were not recorded during courtship between males and females but may help in the accurate localization of the signaling male during aggressive interactions.
White-edged tree frog