The Palm Cockatoo, Probosciger aterrimus, also known as the Goliath Cockatoo, is a large smoky-grey or black parrot of the cockatoo family This bird has its mouth open and the large tongue can be seen and the large crest is erect Bali Bird Park, Bali, I. The Palm Cockatoo, Probosciger aterrimus, also known as the Goliath Cockatoo, is a large smoky-grey or black parrot of the cockatoo family This bird has its mouth open and the large tongue can be seen and the large crest is erect Bali Bird P