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  • Title: Hearing and vocalizations of wild-caught Australian budgerigars (Melopsittacus undulatus).
    Author: Farabaugh SM, Dent ML, Dooling RJ.
    Journal: J Comp Psychol; 1998 Mar; 112(1):74-81. PubMed ID: 9528116.
    Abstract:
    This study examined the hearing and contact calls of wild-caught Australian budgerigars (Melopsittacus undulatus) and compared these data to hearing and vocalizations in the much more extensively studied domesticated budgerigar. The spectral energy in the contact calls of both wild-caught and domesticated budgerigars falls almost exclusively in the frequency of 2-4 kHz. Absolute and masked thresholds were similar in both groups of birds. Similar to the results found in domesticated birds, critical ratio functions for the wild-caught budgerigars decreased at frequencies of 1.0 kHz-2.86 kHz and then increased again dramatically at frequencies above 2.86 kHz.
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