They are secretive, spending most of their time hidden in tall grasses and corn, located by their rasping call - crek-crek.

• 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。