Source : Webster's Revised Unabridged Dictionary (1913)

Kagu \Ka"gu\, n. (Zo["o]l.)
   A singular, crested, grallatorial bird (Rhinochetos jubatus),
   native of New Caledonia. It is gray above, paler beneath, and
   the feathers of the wings and tail are handsomely barred with
   brown, black, and gray. It is allied to the sun bittern.