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  2. Bird vocalization - Wikipedia

    en.wikipedia.org/wiki/Bird_vocalization

    Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs (often simply birdsong ) are the bird sounds that are melodious to the human ear. In ornithology and birding , songs (relatively complex vocalizations) are distinguished by function from calls (relatively simple vocalizations).

  3. Sound localization in owls - Wikipedia

    en.wikipedia.org/wiki/Sound_localization_in_owls

    In sound localization, ITDs are used as cues for location in the azimuth. ITD changes systematically with azimuth. Sounds to the right arrive first at the right ear; sounds to the left arrive first at the left ear. In mammals there is a level difference in sounds at the two ears caused by the sound-shadowing effect of the head.

  4. Perception of infrasound - Wikipedia

    en.wikipedia.org/wiki/Perception_of_infrasound

    In this test, an anesthetized bird is presented with a single sound or a sequence of sounds, followed by an electric shock. The bird's heart-rate will increase in anticipation of a shock. Therefore, a measure of the heart-rate can determine whether the bird is able to distinguish between stimuli that would be followed by a shock from stimuli ...

  5. 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).

  6. Wind industry faces questions about turbines killing birds - AOL

    www.aol.com/news/wind-industry-faces-questions...

    However, the American Bird Conservancy has utilized data from the U.S. Wind Turbine Database to determine that approximately 538,000 wind turbine-caused bird deaths occur each year."

  7. Syrinx (bird anatomy) - Wikipedia

    en.wikipedia.org/wiki/Syrinx_(bird_anatomy)

    Located at the base of a bird's trachea, it produces sounds without the vocal folds of mammals. [1] The sound is produced by vibrations of some or all of the membrana tympaniformis (the walls of the syrinx) and the pessulus, caused by air flowing through the syrinx. This sets up a self-oscillating system that modulates the airflow creating the ...

  8. Bird - Wikipedia

    en.wikipedia.org/wiki/Bird

    Bird calls and songs, which are produced in the syrinx, are the major means by which birds communicate with sound. This communication can be very complex; some species can operate the two sides of the syrinx independently, allowing the simultaneous production of two different songs. [ 105 ]

  9. Bird intelligence - Wikipedia

    en.wikipedia.org/wiki/Bird_intelligence

    Birds communicate with their flockmates through song, calls, and body language. Studies have shown that the intricate territorial songs of some birds must be learned at an early age, and that the memory of the song will serve the bird for the rest of its life. Some bird species are able to communicate in several regional varieties of their songs.

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