Meet the Persian horned viper (Pseudocerastes urarachnoides). The snake, which lives in the western portions of Iran, is commonly referred to as the spider-tailed viper because of the strange spider-like structure attached to its rear end.
By shifting its tail back and forth, the snake is able to create an incredibly realistic illusion of a spider moving around.
The viper uses this unique adaptation to lure in creatures like birds that see a spider as a tasty snack.
When the unsuspecting victim moves in to get a closer look, the viper strikes. Check it out in the video below: