The Collaborative International Dictionary of English v.0.48:

Bird cage \Bird" cage"\, bird-cage \bird-cage\, or Birdcage
\Bird"cage`\, n.
   A cage for confining birds.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "bird cage":
   aviary, birdhouse, bones, columbary, crap game, crap shooting,
   craps, crooked dice, cubes, dice, die, dovecote, ivories,
   loaded dice, perch, pigeon house, pigeon loft, poker dice, roost,
   roosting place, teeth