Retrieves the Taxon for a given bird code, if
any. The code is standardized by Section 11.6, “fixAbbr(): Standardize a bird code”.
# - - - T x n y . l o o k u p A b b r - - -
def lookupAbbr ( self, abbr ):
"""Look up a taxon by bird code.
"""
return self.__abbrMap[abbrMod.fixAbbr(abbr)]