This is an article based on a study done on tropical birds in Panama and how/why they will not do well with climate change (this is an excerpt from it:
"Because the tropics are relatively stable weather wise, tropical birds aren’t able to handle environmental disturbances as easily, physiologically or behaviorally, as temperate-zone birds"
This is not the first one I have read about the fact that tropical birds will do much poorer than other species in adapting to global warming and I think it's very important that we keep this in mind as so many parrot species are tropical. It's also interesting to note that this information is, in a way, validated by what we know about parrots not been able to adjust to change in general - they were never equipped for it because it was not needed!
https://news.mongabay.com/2017/01/tropi ... ing-world/
BUT, on a completely different note, they have found that climate change is already making an Australian species of parrot change (a 'fast track evolution' sort of thing!) by making their wings longer - how very interesting, isn't it?!
http://www.abc.net.au/news/2017-01-02/g ... ge/8152602