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Teresh-Kah, also known as Silver birds, were a type of animal that were native to the planet Vulcan.
They were known for their piercing warble and sang only at dawn in order to greet the sun. In 2269, when Spock suffered from amnesia that led to him forgetting the Vulcan mind rules, he returned to his home world where he was greeted by the ancient melody of the teresh-ka. (TOS novel: Mindshadow)