the mantis stalks the cicada, unaware of the oriole behind (idiom, from Daoist classic Zhuangzi 庄子); to pursue a narrow gain while neglecting a greater danger
螳螂欲捕蝉而不知黄雀在后。典出《庄子.山木》。比喻眼光短浅,只贪图眼前的利益而不顾后患。也作「螳螂捕蝉」。
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