roast duck. Not quite Turkey
Might be more historically accurate than you think...
"The British once served geese, swans, and even peacocks on special occasions"
My two cents: There was a time when it was a sign of progress that nearly all Americans could afford a turkey for Thanksgiving. But at this point in history, a dead animal at the center of a feast no longer symbolizes prosperity, wealth, community, and health. Until recently, meat was expensive and exceptional, dead animals were once reserved for special occasions and so people didn't eat them everyday. Now, however, people eat so much poultry and other flesh that more of it on a holiday doesn't actually symbolize anything worthwhile IMO. It's just the status-quo, what they think is tradition, and what they are used to. The amount of meat Americans eat these days is literally killing them and the planet. It's not a sign of social progress and in fact is the opposite.
The turkeys today that most people will eat on Thanksgiving are actually incapable of reproducing naturally. They have to be artificially inseminated. There's nothing "traditional" about that.