Wiktionary
walking ferns
n. (walking fern English)
Usage examples of "walking ferns".
Without being aware of it, his eyes slowly grew as tired as the rest of his body and he fell into a soft, deep sleep serenaded by the dull cooing of giant walking ferns, night-flying reptiles, and a pool full of harmonizing water bugs who managed a marvelous imitation of what sounded like the journey movement from Prokofiev's Lieutenant Kije Suite.