In Super Mario World, Banzai Bills will not harm Mario as long as he is riding Yoshi and his head is below the vertical center of the Banzai Bill. (Footage recorded by me from a SNES emulator.)
The red-tailed black cockatoo (Calyptorhynchus banksii) is a large black cockatoo native to Australia. Adult males have a characteristic pair of bright red panels on the tail that gives the species its name. Five subspecies are recognised, differing most significantly in beak size. (xxxxxx)
