Snow leopards are solitary cats, though not unsocial. While pairs have been seen hunting together, it is not known if they were male and female or mother and offspring. Females’ ranges are separate but males’ territory may overlap the ranges of females or other males, though duplicate use is separated by time. They do not appear to patrol the boundaries of their home ranges, although they visit most parts at least every two weeks. They exhibit a distinct preference for traveling along major ridges, river bluffs or cliffs, and other well-defined landscape “edges”. These crepuscular cats like to rest in places with good vistas, such as cliff ledges. In areas where they are persecuted for their pelts they tend to be nocturnal. These agile cats have been observed to jump 45 feet in a single leap. They are very slow eaters. The appear to prefer to kill male ungulates (the larger horns make them easier to unbalance). They attack from uphill, as ungulates appear to watch downhill. They are one of the four species of large cats (tigers, clouded leopards, snow leopards and jaguars) which use the “prusten” noise. This is best known in tigers – a throaty exhalation.