Nesting of Parrots in City

Parrots in our city have greatest threats on there nesting.
I am staying in the western part of Chennai.
We can easily spot ring neck parrots at our area during morning and evening times.
Usually parrots build their nest in tall trees. They make nests by creating holes in trees.
Rapid construction of buildings becomes greater threat to the natural surrounding.
Lots of trees are cut down day by day, which makes life of the birds in the city very difficult. Adult birds can switch off the location if there nests are demolished but young birds cannot survive during these kind of situations :’(