snakes and birds

sometimes it's as if i lived my sister's life / or i am inside it / i inhabit her gestures / my sister had a clique of friends in college / ages ago / they claimed all people resembled either birds or snakes / there were no hybrids / there were no cats no horses no starfish / they went around categorizing whole populations / they did their best to be outrageous / one threw up in my room / though i would not admit it to them / i have been surveying the data / 30 years later i can report back / the split is not even