The Collaborative International Dictionary of English v.0.48:
Bird fancier \Bird" fan`ci*er\ 1. One who takes pleasure in rearing or collecting rare or curious birds. [1913 Webster] 2. One who has for sale the various kinds of birds which are kept in cages. [1913 Webster]WordNet (r) 3.0 (2006):
bird fancier n 1: a person with a strong interest in birds