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2. Bird scarer - Wikipedia

   en.wikipedia.org/wiki/Bird_scarer

   Ultrasonic devices are static sound-emitting bird deterrents, which, in theory, will annoy birds to keep them away from enclosed or semi-enclosed areas. Ultrasonic scarers are not harmful to birds, however, there is debate around birds' ability to hear these frequencies at loud enough decibels.

3. Acoustic harassment device - Wikipedia

   en.wikipedia.org/wiki/Acoustic_harassment_device

   Acoustic harassment and acoustic deterrents are technologies used to keep animals [1] and in some cases humans away from an area. Applications of the technology are used to keep marine mammals away from aquaculture facilities and to keep birds away from certain areas (for instance in the vicinity of airports and blueberry fields).

4. Bird control - Wikipedia

   en.wikipedia.org/wiki/Bird_control

   Spikes against birds on information panel and camera system in The Hague Central Station, The Netherlands, 2024. Physical bird deterrents include steel or plastic spike systems, bird netting, [5] electrified wire systems, non-electrified wire systems, electrified track systems, slope barriers, mechanical spiders, chemical foggers and more.

5. Meet Rufus, the hawk who keeps pigeons away from Wimbledon - AOL

   www.aol.com/news/meet-rufus-hawk-keeps-pigeons...

   Every morning, from 5 to 9, before thousands of spectators enter and play gets underway, the beloved Harris' hawk flies over the world’s most manicured tennis courts and keeps the pesky nuisance ...

6. Rufus the Hawk - Wikipedia

   en.wikipedia.org/wiki/Rufus_the_Hawk

   Scaring birds away from the Wimbledon Championships Rufus the Hawk is a Harris's Hawk used by the All England Lawn Tennis and Croquet Club to keep pigeons away from their venue. Described as an "important member of the Wimbledon family", [ 1 ] Rufus has been scaring away the birds for fifteen years, [ 2 ] taking over from the previous hawk, Hamish.

7. Pigeon whistle - Wikipedia

   en.wikipedia.org/wiki/Pigeon_whistle

   The sound of the whistle varies depending on the movement of the wings, acceleration of the pigeon, wind speed, wind direction and the positions of pigeons within the flock. [8] The effect of Mann and Petravicius' displays has been described as "unlike any other phenomenon", with Petravicius describing it as "rubbish on record but brilliant live".