"You may eat all clean birds"—Deuteronomy 14:11.
We are commanded to inspect fowl before consuming them, to ascertain whether they possess the signs that characterize non-kosher birds. The Torah doesn't specify signs for non-kosher fowl; rather, it supplies us with a list of forbidden fowl species. Nevertheless, when studying the group of the listed birds, we can isolate certain common signs that they all share.
