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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).
A traditional scarecrow. Bird scarers is a blanket term used to describe devices designed for deterring birds by startling, confusing or otherwise repeling them, typically employed in commercial settings by farmers to dissuade birds from consuming and defecating on recently planted arable crops.
Certain words in the English language represent animal sounds: the noises and vocalizations of particular animals, especially noises used by animals for communication. The words can be used as verbs or interjections in addition to nouns , and many of them are also specifically onomatopoeic .
The sound-producing rattle of rattlesnakes is an acoustic form of aposematism. [30] Sound production by the caterpillar of the Polyphemus moth, Antheraea polyphemus, may similarly be acoustic aposematism, connected to and preceded by chemical defences. [31] Similar acoustic defences exist in a range of Bombycoidea caterpillars. [32]
These Halloween riddles and spooky jokes are guaranteed to scare up all the laughs along with testing kids' and adults' knowledge with clever brainteasers. 58 Halloween riddles and answers that ...
Scarecrows in a rice paddy in Japan. A scarecrow is a decoy or mannequin that is often in the shape of a human. Humanoid scarecrows are usually dressed in old clothes and placed in open fields to discourage birds from disturbing and feeding on recently cast seed and growing crops. [1]
Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, magpies, jackdaws, jays, treepies, choughs, and nutcrackers. [1] [2] [3] In colloquial English, they are known as the crow family or corvids. Currently, 139 species are included in this family.
[11] [12] [13] It is postulated that birds might use the detection of naturally occurring infrasound for long-range directional cues from distant landmarks, or for weather detection. [14] Since hearing tests at infrasonic frequencies have been conducted on a small number of bird species, the true diversity of this ability among birds is unknown ...