Dawn song functions as preventive territorial defense against intruders in winter wrens.

Evidence

In playback experiments conducted by Amrhein and Erne (2006) on the winter wren (Troglodytes troglodytes), in which the presence of an intruder was simulated inside the territory of a singing male before sunrise (dawn chorus time), it was found that the day after the supplementary song the resident male was singing at dawn more vigorously but not after sunrise. A preventive territorial proclamation seems the mechanism triggered by the administration of a simulated intruder and demonstrates, at least in this species, that the dawn period is used extensively for territory defense. — Almo Farina, Soundscape Ecology, 1710

Categorization

• XREF: connects to: Fat reserves accumulated the prior day drive dawn and dusk chorus singing. — Almo Farina, Soundscape Ecology: Principles,…, 1703; Dawn chorus intensity signals habitat resource availability — Bernie Krause and Almo Farina, Using Ecoacoustic Methods to Survey the…, 57

Broader Connections

• Dawn chorus intensity signals habitat resource availability #expands (0.75) — Bernie Krause and Almo Farina, Using Ecoacoustic Methods to Survey the…, 57