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The devices have also been employed to keep marine mammals away from fishing nets. [2] The devices are known as acoustic harassment devices (AHDs) and acoustic deterrent devices, which are smaller AHDs [3] or intended as an awareness tool to warn species to the presence of danger rather than as a tool of harassment at a much louder level. [4]
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Mobbing can also be used to obtain food, by driving larger birds and mammals away from a food source, or by harassing a bird with food. One bird might distract while others quickly steal food. Scavenging birds such as gulls frequently use this technique to steal food from humans nearby. A flock of birds might drive a powerful animal away from food.
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However, once birds realize these pose no real threats, they can easily become habituated to sounds that seemed initially frightening. If just being placed in situ and left, audible bird scarers can easily become ineffective bird control solutions, however when managed on an ongoing basis or used as part of a greater bird deterrent system ...
Three people birdwatching with binoculars. Birdwatching, or birding, is the observing of birds, either as a recreational activity or as a form of citizen science.A birdwatcher may observe by using their naked eye, by using a visual enhancement device such as binoculars or a telescope, by listening for bird sounds, [1] [2] watching public webcams, or by viewing smart bird feeder cameras.
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