Birds convert sound degradation directly into graded defensive behaviors

Evidence

Richards (1981) found that this species uses distance information of sound to react differently: attacking when the singer is close and countersinging when the singer is far. Degraded sound means that a bird is outside the territory and this produces a singing reply. When the sound arrives undegraded this means that the conspecific singer is close and the reaction is a direct attack. This capacity allows wrens to conserve time and energy to be used in territorial defense. — Almo Farina, Soundscape Ecology, 647

Categorization

• XREF: connects to: Birds react to close conspecific songs and ignore distant degraded ones — Almo Farina, Soundscape Ecology: Principles,…, 613; Ambient noise impairs birds’ territory defense and mate attraction — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 942

Broader Connections

• Ambient noise impairs birds’ territory defense and mate attraction #expands (0.80) — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 942