What was John Audubon's claim?

for AP US History I am suppossed to give a speech as John J Audubon. It is for a "reformer's convention" And apparently he had a "claim" for something he wanted to reform. I can't find anything on it online. Anyone know? I know he was part of the art movement of the 19th century, I don't know what this movement was for. That would help too.