Bio-acoustics disperse birds

Scarecrow has released a new version of Marina, the system for land- and offshore-based bird control and dispersal by bio-acoustic means. Marina Mk 11 is self-programmable at the point of installation. The programme provides up to six bird calls from nine available by turning a keyswitch to "run", after which dispersal playback will take place fully automatically at random times from then on.


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Both light sensoring for day-night cycling and infrared movement sensoring, operating 24 hours a day can be included. The relevant accessory reacts to birds which fly into the dispersal area after dark, after the daylight sensor has put the Marina system into “sleep” mode.

The system can also be reprogrammed to match seasonal changes in the bird population.

Also available is One-Shot, a “junior” version of Marina Mk 11 comprising a small, wall mounting enclosure and up to four loudspeakers.

Since its introduction almost a year ago, Scarecrow reports that One-Shot has been installed successfully in shopping precincts, malls, urban areas, parks, outdoor cafes, restaurants, food plants and warehouses, schools and transport termini – anywhere that birds present a hazard to health and safety.


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