A quirin or quiru is a folkloric stone allegedly is found in the nests of either the lapwing or the hoopoe, two Old World species of birds often confused in earlier centuries.
Quirins were said to have the powers of a truth serum and were highly valued and searched by witches and magicians. When placed beneath a pillow, the quirin causes a person to talk in his sleep and confess his “rogueries.”
The lapwing, a species of plover, exists in Europe and Asia, while the hoopoe, related to the kingfisher, lives in Europe, Asia and Africa. Both are crested but they are differently colored: the lapwing is predominantly gray and white, while the hoopoe is orange-gold, black and white.