I want to know the answer to the following question:
What is another name for steamer ducks?
All the background I'm provided with is that "The steamer ducks (Tachyeres), geese and swans (Anserinae), the solitaire (Pezophaps), sheathbills (Chionis), some guans (Crax) and stone curlews (Burhinus) use a bony knob on the alular metacarpal to punch and hammer opponents.". Is that enough to answer the question?