一項22年的研究記錄了哥斯達黎加黃頸亞馬遜鸚鵡語言的文化轉變。1994年，研究記錄了北部、南部及尼加拉瓜鸚鵡的三種不同方言 。2005年的調查顯示這三個地區的方言沒有特別的變化。然而，牠們的語言在2016年發生了變化——北方同時使用南北方口音的鸚鵡較多，而兩方的邊界以前只使用南方方言，卻出現了新的變體方言。2016年左右，當地由於農業發展及棲息地被破壞，鸚鵡的數量大量下降，並被列為極度瀕危物種。語言的變化可能代表了鸚鵡因環境的變化而經歷了文化的轉變。

A 22-year research records the cultural change in the dialects of the yellow-naped amazon parrot in Costa Rica. In 1994, the research recorded the three acoustically distinct dialects of the parrots in the North, South and Nicaraguan, and the surveys in 2005 showed the dialects in these three areas were unchanged. However, they discovered their dialect changed in 2016. There were more “bilingual”(using both North and South dialects) parrots in the North, and there was a new variants in the boundary between both North and South dialects, where formerly only used the South dialect. around 2016, the population of the parrots declined and was listed as critically endangered because of intensive agriculture and habitat loss. The changes in dialects may represent the parrots experienced cultural shifts because of the changing environments.

https://www.earth.com/news/birds-have-regional-accents-just-like-humans/