理事会发现，27个监测物种中还有17种尚未恢复。
The Trustee Council found 17 of 27 monitored species have not recovered.
它可以用于监测任何以枯木为生的物种，也就是任何居住在木头里的昆虫或者甲虫，因为它们都会发出不同的声音。
It can be used for any saproxylic species - any insects or beetles that live within wood because they all make different sounds.
因此，监测锹虫物种数量是一项法律要求。
As a result, there was a legal requirement to monitor the species' Numbers.
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