Huay Hong Krai, 20 some kilometers out of Chiang Mai on the way to Chiang Rai is where one needs to go to see Green Peafowl in the wild. Well, some don't think they originate from a wild population but I can testify to the lack of tameness of these birds. They are easily shooed away and outright hard to get a decent shot of.
As big as they are they readily take to higher branches when alarmed.
I saw a flock of 6 birds that took off from high in the trees and flew across the waters nearby to settle in the forest across. Quite a sight to see these huge birds in flight.