The Collaborative International Dictionary of English v.0.48:

Spinetail \Spine"tail`\, n. (Zool.)
   (a) Any one or several species of swifts of the genus
       Acanthylis, or Chaetura, and allied genera, in which
       the shafts of the tail feathers terminate in rigid
       spines.
   (b) Any one of several species of South American and Central
       American clamatorial birds belonging to Synallaxis and
       allied genera of the family Dendrocolaptidae. They are
       allied to the ovenbirds.
   (c) The ruddy duck. [Local, U.S.]
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ruddy \Rud"dy\, a. [Compar. Ruddier; superl. Ruddiest.] [AS.
   rudig. See Rud, n.]
   1. Of a red color; red, or reddish; as, a ruddy sky; a ruddy
      flame. --Milton.
      [1913 Webster]

            They were more ruddy in body than rubies. --Lam. iv.
                                                  7.
      [1913 Webster]

   2. Of a lively flesh color, or the color of the human skin in
      high health; as, ruddy cheeks or lips. --Dryden.
      [1913 Webster]

   Ruddy duck (Zool.), an American duck (Erismatura rubida)
      having a broad bill and a wedge-shaped tail composed of
      stiff, sharp feathers. The adult male is rich brownish red
      on the back, sides, and neck, black on the top of the
      head, nape, wings, and tail, and white on the cheeks. The
      female and young male are dull brown mixed with blackish
      on the back; grayish below. Called also dunbird,
      dundiver, ruddy diver, stifftail, spinetail,
      hardhead, sleepy duck, fool duck, spoonbill, etc.


   Ruddy plover (Zool.) the sanderling.
      [1913 Webster]