Assertion: pika | /r/CapableOf | emit shrill sound
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Source sentences:
text: 1820–30; recorded by the German naturalist P.S. Pallas (1741–1811) as the name for the animal in Evenki; compare Evenki (N Baikal dial.) pikačān a name for the tree creeper ( Certhia familiaris ), apparently based on Russian píkatʾ to squeak, peep (compare Russian pishchúkha a name for both the tree creeper and the pika, which emits a shrill sound)