Jackals are small omnivorous mammals in the genus Canis, which also includes wolves and dogs. There are three main species: the black-backed jackal and side-striped jackal of Africa, and the golden jackal of Eurasia. Jackals are opportunistic predators and scavengers, hunting small mammals, birds, and reptiles. They live in monogamous pairs that defend territories from other pairs. Researchers in Romania estimate around 7,000 jackals there, but the number is approximate. Hunters and volunteers want to observe the jackals to determine if they are a biological threat, while sheepherders are aware of danger from jackals attacking sheep.