The Blossom-headed Parakeet (Psittacula roseata) is a parrot which is a resident breeder in northeast India eastwards into Southeast Asia. It undergoes local movements, driven mainly by the availability of the fruit and blossoms which make up its diet. In these photos which I took near Doi Inthanon, you can see the difference between the male and female. He has a brighter head with a distinct neck ring and she has a pale lavender head with no neck ring.
Although the Blossom-headed Parakeet has a fairly large range across South-east Asia, Thailand is by far the easiest country to travel in logistically, especially for people like me who prefer independent travel in a rental car. After doing my homework, I settled on Doi Inthanon (red dot below) as the best bet to see this bird reliably.
Maybe I should have gone to Vietnam where this beautiful footage of a male Blossom-headed Parakeet was filmed.