Why would a spiritually evolved human being wish to take birth in animals or birds?
A spiritually evolved being can opt to take birth in the animal or bird species out of his own free will to pursue his spiritual practice undisturbed by the distractions faced in a human birth. It is possible for spiritually evolved beings to carry on spiritual practice even when in the animal or bird species because 98% of spiritual practice is subtle and internal to the person, i.e. not in terms of any tangible actions. When a spiritually evolved being takes birth in a lower species, ie. as an animal or a bird, it is up to him to also decide when to end that existence. Why is this parrot able to speak? In this particular case, the parrot’s ability to speak and to acquire an extensive vocabulary is because he is a devolved human being. He has not come down of his own free will. Hence, he does not remember his past human birth. He has come down as punishment for his demerits. He was a person at a spiritual level of 30% with intense desire to be the centre of attention. A strong attenti