The Collaborative International Dictionary of English v.0.48:

Redbird \Red"bird`\ (-b?rd`), n. (Zool.)
   (a) The cardinal bird.
   (b) The summer redbird (Piranga rubra).
   (c) The scarlet tanager. See Tanager.
       [1913 Webster]

WordNet (r) 3.0 (2006):

redbird
    n 1: the male is bright red with black wings and tail [syn:
         scarlet tanager, Piranga olivacea, redbird,
         firebird]
    2: crested thick-billed North American finch having bright red
       plumage in the male [syn: cardinal, cardinal grosbeak,
       Richmondena Cardinalis, Cardinalis cardinalis, redbird]

U.S. Gazetteer Places (2000):

Redbird, OK -- U.S. town in Oklahoma
   Population (2000):    153
   Housing Units (2000): 76
   Land area (2000):     0.826934 sq. miles (2.141750 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.826934 sq. miles (2.141750 sq. km)
   FIPS code:            62200
   Located within:       Oklahoma (OK), FIPS 40
   Location:             35.888676 N, 95.588211 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Redbird, OK
    Redbird