More parrot variants in savannas

Minecraft currently has five species of parrot - four of which are macaws and one of which is a member of the cockatoo family - the cockatiel (the gray-yellow parrot). The cockatiel feels lonely on its own, and would likely better suit the savanna rather than the jungle, thus I propose:

Move the cockatiel to the savanna biome, and add three other cockatoo variants to accompany it as savanna exclusives. A palm cockatoo, a sulfur crested cockatoo, and a galah as examples. These four would be a simple, yet effective inclusion at adding some life to the otherwise underutilized savanna biome, and would encourage any parrot-loving players to travel to both the jungle and the savanna to collect them all.