Answer:
The population has decreased because the number of live births has decreased.
The evidence suggests that the population has decreased because of the lack of food availability and resource population due inappropriate management of habitat. The parrots losing their resource population has affected the reproduction cycles of the breeding females causing lower live births in these parrots.
Climate change also should be taken into account, with the everyday change in the climate it makes for migration to populated breeding grounds unmanageable. If this proves to be the case then an artificial climate controlled sanctuary may be one of the last hopes to saving this breed on parrot.
Based on the evidence, I conclude that improving or creating an ecosystem where the food resources are plentiful and the climate was sustainable would increase the breeding of the animal.
Explanation: Hope this Helps.