A hasejan, also known as a hare or jackrabbit, is a type of fast-running mammal belonging to the family Leporidae. These animals are characterized by their long ears, powerful hind legs, and typically large eyes, which aid in their survival by allowing them to detect predators. Hasejans are primarily herbivorous, feeding on grass, leaves, and other vegetation. They are known for their agility and speed, which help them escape from threats in their natural habitats.