Maybe its a fake one. I was at Hobby Lobby the other day and was blown away how REAL those fake ones looked. You could always give it some water , let it dry well, and see if it "wakes up"
They'll get blown down from the trees when we get high winds and rain. Picked this one up in my yard. Not fake but maybe it was already dead when I brought it inside - hence the no change with 0 care, haha.