东黑冠长臂猿
东黑冠长臂猿-
结果表明东黑冠长臂猿叫声的频率高，已经达到达到甚至超过了4千赫兹。
The results showed that the frequency of sonogram was very high , it tended to or exceeded 4 kHz .
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结果表明：东黑冠长臂猿倾向于在早晨鸣叫，有91.4%的鸣叫发生在日出前半小时至日出后3小时之间，其中53.1%的鸣叫发生在日出后1小时内。
The results showed gibbon groups tended to sing in the early morning . Most ( 91.4 % ) of singing bouts occurred between half an hour before and three hours after the sunrise , and 53.1 % occurred one hour after the sunrise .