Why is the pink cockatoo endangered?

Unlike the Galah, which has thrived, the Pink Cockatoo has suffered enormously from land clearing for grazing and agriculture, which has greatly reduced native food plants for this species, as well as dramatically reducing its breeding sites. As a species the Pink Cockatoo requires extensive woodlands in order to support a viable population. During breeding, Pink Cockatoo pairs are fiercely territorial and will not tolerate others within several kilometers of their nesting site. With so few suitable nesting areas now available, the Pink Cockatoo is declining at an alarming rate in the wild. Trapping for illegal bird trade has exacerbated this decline.