I want to know the answer to the following question:
What do stone curlews use to punch and hammer opponents?
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?
Answer: yes