Found in 2 comments on Hacker News
EdwardDiego · 2020-01-10 · Original thread
Kea are another interesting social parrot. I highly recommend Kea, Bird of Paradox: The Evolution and Behavior of a New Zealand Parrot:
EdwardDiego · 2019-12-12 · Original thread
I highly recommend this book, written by two American ornithologists watching kea in the field for years:

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