" They set out together in the moonlight. They had gone a good way along the hedge when they came upon an old box lying in the ditch. Sitting on top of the box was Yona the hedgehog. His prickles were stuck all over with dog-rose petals and he was making an extraordinary squeaking, grunting noise and waving his black paws. They stopped and looked at him.
“Whatever are you doing, Yona?” asked Hufsa in astonishment.
“Singing to the moon,” answered Yona. “All hedgehogs have to sing to the moon to make the slugs come, surely you know that?
‘O Slug-a-Moon, O Slug-a-Moon,
O grant thy faithful hedgehog’s boon! "

― Richard Adams , Watership Down (Watership Down, #1)