Passive acoustic monitoring technology is transforming wildlife welfare and conservation by detecting animal presence, behaviour and stress indicators across vast areas without direct observation.
Acoustic monitoring provides a non-invasive window into wildlife welfare that direct observation cannot match in scale or continuity. Animals vocalise in ways that reflect their behavioural state — distress calls, contact calls, feeding vocalisations and alarm responses all carry welfare-relevant information. At landscape scale, acoustic monitoring can detect the effects of habitat fragmentation, noise pollution and human disturbance on wildlife behaviour and distribution. For marine mammals particularly, the acoustic environment is fundamental to welfare, making hydrophone monitoring of shipping lanes, industrial noise and military sonar an important welfare tool. The technology is now affordable enough for community wildlife groups to deploy alongside professional conservation programmes.