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The archosaurian shift from larynx to syrinx must have conferred a selective advantage for crown birds, but the causes for this shift remain unknown. [10] To complicate matters, the syrinx falls into an unusual category of functional evolution: arising from ancestors with a larynx-based sound source, the syrinx contains significant functional overlap with the structure it replaced.
Birds regulate the airflow through the syrinx with muscles—M. syringealis dorsalis and M. tracheobronchialis dorsalis—that control the medial and lateral labia in the syrinx, whose action may close off airflow. [2] Song may, hence, be produced unilaterally through one side of the syrinx when the labia are closed in the opposite side.
The score was re-recorded and re-released in 2000 to address some perceived problems with its original incarnation. The tracks were reordered into their onscreen chronology (the original album separated the Jones material from that composed by Edelman), some additional cues were added, and Clannad's "I Will Find You" was no longer included.
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).
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10 languages. العربية ... Squawk (sound) Swan song; Syrinx (bird anatomy) T. Turkey call; Tweet of the Day; V. ... This page was last edited on 30 April 2014 ...
The Last of the Mohicans is a 1971 BBC serial, based on the 1826 novel of the same name by James Fenimore Cooper, directed by David Maloney. [1]It was shown during the Sunday tea time slot on BBC One, which for several years showed fairly faithful adaptations of classic novels aimed at a family audience.
The Last of the Mohicans is a 1992 American epic historical drama film produced and directed by Michael Mann, who co-wrote the screenplay with Christopher Crowe, based on the 1826 novel of the same name by James Fenimore Cooper and its 1936 film adaptation. The film is set in 1757 during the French and Indian War.