hippopotamus, hippo, river horse, Hippopotamus amphibius
['bustard', 'killer whale, killer, orca, grampus, sea wolf, Orcinus orca', 'boa constrictor, Constrictor constrictor', 'African grey, African gray, Psittacus erithacus', 'piggy bank, penny bank', 'water snake', 'pug, pug-dog']