gnat hawk

from The Collaborative International Dictionary of English v.0.48
Goatsucker \Goat"suck`er\, n. (Zool.)
   One of several species of insectivorous birds, belonging to
   {Caprimulgus} and allied genera, esp. the European species
   ({Caprimulgus Europ[ae]us}); -- so called from the mistaken
   notion that it sucks goats. The European species is also
   {goat-milker}, {goat owl}, {goat chaffer}, {fern owl}, {night
   hawk}, {nightjar}, {night churr}, {churr-owl}, {gnat hawk},
   and {dorhawk}.
   [1913 Webster]
    
from The Collaborative International Dictionary of English v.0.48
Gnat \Gnat\, n. [AS. gn[ae]t.]
   1. (Zool.) A blood-sucking dipterous fly, of the genus
      {Culex}, undergoing a metamorphosis in water. The females
      have a proboscis armed with needlelike organs for
      penetrating the skin of animals. These are wanting in the
      males. In America they are generally called mosquitoes.
      See {Mosquito}.
      [1913 Webster]

   2. Any fly resembling a Culex in form or habits; esp., in
      America, a small biting fly of the genus {Simulium} and
      allies, as the buffalo gnat, the black fly, etc.
      [1913 Webster]

   {Gnat catcher} (Zool.), one of several species of small
      American singing birds, of the genus {Polioptila}, allied
      to the kinglets.

   {Gnat flower}, the bee flower.

   {Gnat hawk} (Zool.), the European goatsucker; -- called also
      {gnat owl}.

   {Gnat snapper} (Zool.), a bird that catches gnats.

   {Gnat strainer}, a person ostentatiously punctilious about
      trifles. Cf. --Matt. xxiii. 24.
      [1913 Webster]
    

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