poorwill

from WordNet (r) 3.0 (2006)

poorwill
    n 1: goatsucker of western North America [syn: {poorwill},
         {Phalaenoptilus nuttallii}]

from The Collaborative International Dictionary of English v.0.48

Poor-will \Poor"-will`\, n. [So called in imitation of its
   note.] (Zool.)
   A bird of the Western United States ({Phal[ae]noptilus
   Nutalli}) allied to the whip-poor-will.
   [1913 Webster]