And they were lucky enough to find this Eastern Grey kangaroo female with her offspring.
他们真的够幸运，能发现东部灰袋鼠妈妈和她的孩子。
"The foot thump shows potential as a deterrent of eastern grey kangaroos. And is less likely to suffer from habituation because it is a natural sound," bender said.
本德尔说，袋鼠用脚拍地的声音具有威慑东部灰袋鼠的潜在力，由于它是自然声音，因此它不大可能因被袋鼠适应而逐渐丧失威慑作用。
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