In our study we taught a female African Grey 11 Italian words: vowel-like sounds were extracted from comprehensible
words after critical listening, and pitch frequency (Pkf) was measured for the first three formants of each
vowel. Similarly, formants from human vowels were isolated and measured. The analysis run on formant frequencies
mean values of both samples revealed that human vowels could be separated on the basis of the first three formants. Comparison
between each human vowel and its parrot counterpart revealed that four out of five parrot vowels could be considered
statistically different from human ones regarding the first two formants, but comparison between F2/F1 and F3/F2 are
not significant. Our results suggest that formant spaces do exist in the vocalic production of a talking bird. This leads to
interesting conclusions about generalization skills involved in speech recognition, vowel parsing patterns and label production.