Drawing a predator

Explaining Nature on Instagram: "The spider-tailed horned viper, native to western Iran, is one of the most fascinating snakes in the world. At first glance, it may appear similar to other vipers with its rough scales and camouflaged body, but its tail reveals a remarkable secret. At the very tip, this snake carries a bulbous structure fringed with thin, elongated scales, perfectly mimicking the shape and movement of a spider. When the viper flicks its tail across the sand or rocks, the illusion