A book written by a bird lover and biologist on the breeding and chick raising behaviors and strategies of birds - and guess what kind of bird is on the cover: Yep, parrots! Keas to be more precise...
I am posting this here because people who own parrots usually forget that having a mate or, at least, a companion of their own species is so very necessary for these birds wellbeing. They were never meant to be alone and humans are not a good substitute for their needs.
First link is about the book and the second link is an interview with the writer (and I recommend you read it).
https://press.princeton.edu/books/hardc ... /bird-love
https://www.psychologytoday.com/us/blog ... life-birds