Caddow

from The Collaborative International Dictionary of English v.0.48

Caddow \Cad"dow\, n. [OE. cadawe, prob. fr. ca chough + daw
   jackdaw; cf. Gael. cadhag, cathag. Cf. {Chough}, {Daw}, n.]
   (Zool.)
   A jackdaw. [Prov. Eng.]
   [1913 Webster]