土狼一种生长于非洲南部和东部的哺乳动物（羽毛状土狼土狼属），形状象鬣狗，长有夹杂黑色条纹的灰色绒毛，主要以白蚁和昆虫的幼虫为食。
A mammal(Proteles cristatus)native to southern and eastern Africa that resembles the hyena , has gray fur with black stripes, and feeds mainly on termites and insect larvae.
其它夜食动物如麝香猫、獴和土狼也偶尔发出这种声音。
Other nocturnal solitary predators such as civets, mongooses and even hyenas are known to purr occasionally.
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