avifauna

from WordNet (r) 3.0 (2006)

avifauna
    n 1: the birds of a particular region or period

from The Collaborative International Dictionary of English v.0.48

Avifauna \A`vi*fau"na\, n. [NL., fr. L. avis bird + E. fauna.]
   (Zool.)
   The birds, or all the kinds of birds, inhabiting a region.
   [1913 Webster]