Source : Webster's Revised Unabridged Dictionary (1913)

Red-tailed \Red"-tailed`\ (-t?ld`), a.
   Having a red tail.

   {Red-tailed hawk} (Zo["o]l.), a large North American hawk
      ({Buteo borealis}). When adult its tail is chestnut red.
      Called also {hen hawck}, and {red-tailed buzzard}.

Hen \Hen\, n. [AS. henn, hen, h[ae]n; akin to D. hen, OHG.
   henna, G. henne, Icel. h?na, Dan. h["o]na; the fem.
   corresponding to AS. hana cock, D. haan, OHG. hano, G. hahn,
   Icel. hani, Dan. & Sw. hane. Prob. akin to L. canere to sing,
   and orig. meaning, a singer. Cf. {Chanticleer}.] (Zo["o]l.)
   The female of the domestic fowl; also, the female of grouse,
   pheasants, or any kind of birds; as, the heath hen; the gray
   hen.

   Note: Used adjectively or in combination to indicate the
         female; as, hen canary, hen eagle, hen turkey, peahen.

   {Hen clam}. (Zo["o]l.)
   (a) A clam of the {Mactra}, and allied genera; the sea clam
       or surf clam. See {Surf clam}.
   (b) A California clam of the genus {Pachydesma}.

   {Hen driver}. See {Hen harrier} (below).

   {Hen harrier} (Zo["o]l.), a hawk ({Circus cyaneus}), found in
      Europe and America; -- called also {dove hawk}, {henharm},
      {henharrow}, {hen driver}, and usually, in America, {marsh
      hawk}. See {Marsh hawk}.

   {Hen hawk} (Zo["o]l.), one of several species of large hawks
      which capture hens; esp., the American red-tailed hawk
      ({Buteo borealis}), the red-shouldered hawk ({B.
      lineatus}), and the goshawk.

Hawk \Hawk\, n. [OE. hauk (prob. fr. Icel.), havek, AS. hafoc,
   heafoc; akin to D. havik, OHG. habuh, G. habicht, Icel.
   haukr, Sw. h["o]k, Dan. h["o]g, prob. from the root of E.
   heave.] (Zo["o]l.)
   One of numerous species and genera of rapacious birds of the
   family {Falconid[ae]}. They differ from the true falcons in
   lacking the prominent tooth and notch of the bill, and in
   having shorter and less pointed wings. Many are of large size
   and grade into the eagles. Some, as the goshawk, were
   formerly trained like falcons. In a more general sense the
   word is not infrequently applied, also, to true falcons, as
   the sparrow hawk, pigeon hawk, duck hawk, and prairie hawk.

   Note: Among the common American species are the red-tailed
         hawk ({Buteo borealis}); the red-shouldered ({B.
         lineatus}); the broad-winged ({B. Pennsylvanicus}); the
         rough-legged ({Archibuteo lagopus}); the sharp-shinned
         {Accipiter fuscus}). See {Fishhawk}, {Goshawk}, {Marsh
         hawk}, under {Marsh}, {Night hawk}, under {Night}.

   {Bee hawk} (Zo["o]l.), the honey buzzard.

   {Eagle hawk}. See under {Eagle}.

   {Hawk eagle} (Zo["o]l.), an Asiatic bird of the genus
      {Spiz[ae]tus}, or {Limn[ae]tus}, intermediate between the
      hawks and eagles. There are several species.

   {Hawk fly} (Zo["o]l.), a voracious fly of the family
      {Asilid[ae]}. See {Hornet fly}, under {Hornet}.

   {Hawk moth}. (Zo["o]l.) See {Hawk moth}, in the Vocabulary.
      

   {Hawk owl}. (Zo["o]l.)
   (a) A northern owl ({Surnia ulula}) of Europe and America. It
       flies by day, and in some respects resembles the hawks.
   (b) An owl of India ({Ninox scutellatus}).

   {Hawk's bill} (Horology), the pawl for the rack, in the
      striking mechanism of a clock.