Also wallydrag, wallidrag, -draggle, -dragle, -tragle, warydraggel, -draggle, etc. (Cf. drag, draggle)
1808 J. Jamieson, An etymological dictionary of the Scottish language — n., A feeble, ill-grown person or animal; a worthless, slovenly person, esp. a woman. "It appears primarily to signify the youngest of a family, who is often the feeblest. It is sometimes used to denote the youngest bird in a nest."
1826 J. Galt, Last of the Lairds — "It's just like a cuckoo dabbing a wallydraigle out o' the nest."
1873 W. Alexander, Johnny Gibb — "Yon bit pernicketty wallydraggle!"