They are secretive, spending most of their time hidden in tall grasses and corn, located by their rasping call - crek-crek.
英
美
牠们习于躲藏,多数时间都躲在高耸的草丛和玉米田中,人们得藉著牠们刺耳的嘎嘎叫声才得以分辨牠们所在位置。
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