We have published a new paper entitled "Acquired human speech sounds replace conspecific syllables in the song of budgerigars Melopsittacus undulatus", by Watanabe A, Kitahara M, Sano A, Satoh R, Miyamoto T, and Eda-Fujiwara H, which is in Behavioural Processes 226, 105171 (2025).
https://doi.org/10.1016/j.beproc.2025.105171