Source : Webster's Revised Unabridged Dictionary (1913)

Sprigtail \Sprig"tail`\, n. (Zo["o]l.)
   (a) The pintail duck; -- called also {sprig}, and
       {spreet-tail}. [Local, U.S.]
   (b) The sharp-tailed grouse. [Local, U.S.]

Source : WordNet®

sprigtail
     n : large grouse of prairies and open forests of western North
         America [syn: {sharp-tailed grouse}, {sprig tail}, {Pedioecetes
         phasianellus}]