10. Barbados threadsnake (Barbados)
The world’s smallest snake is Bajan—who knew? The spaghetti-like Barbados threadsnake is so small it’s often mistaken for a worm—the largest specimen ever recorded was only four inches long. Notably, the female is known to lay one massive egg relative to her own size. Only “discovered” by science a few years ago, not much is known about the ecology, abundance, or distribution of this species. But with all of Barbados’ original forest now depleted, it likely faces a battle for survival, and is only found in a small pocket on the island’s eastern side.