Snakes shed their skin, as they start to grow out of it, and that is what she sees, not a dead snakes skin. Ignorant biotch.
Back in New York City, she'd be confronted with plenty of snakes, but not the ones that shed their skin. Sure we've got snakes, even Timber Rattlers in the Adirondacks, but she probably hasn't seen any other part of New York State, other than the Rotten Apple she came from.