Cougars are elusive, and human encounters are uncommon. The National Park Service nevertheless describes them as unpredictable and potentially dangerous. Those statements belong together. The useful response is neither alarm at every distant cat nor a promise that a rare event cannot happen. Published injury records help describe the events that were documented; agency guidance addresses how to behave if an encounter occurs.
What an injury record can show
In a 2019 study in Wilderness & Environmental Medicine, Wang and colleagues reported 74 verified cougar attacks from 1924 to 2018 across ten reporting states; they reported that 16 (46%) of the 35 people with hospitalization information available were hospitalized. They requested historical records from wildlife officials and analyzed the attacks retrospectively. This was a study of documented attacks, not a survey of every human encounter or a measurement of the risk on a particular Illinois trail.
The researchers concluded that attacks were uncommon but could be fatal. Their abstract reports more attacks in summer and fall, with most during daylight. It says the head, neck and chest were frequent injury sites. These are findings from the assembled record; they do not justify assuming that another season or time of day removes the need to follow encounter advice.
. Its different information fields were not complete for every event. A percentage must be read with its denominator and the type of event studied. It is not the probability that a walker seeing a cougar will be injured, and it is not a local Illinois rate.
The practical result is the researchers' stated conclusion: uncommon events can still have serious consequences. For the distinction between an encounter and evidence that a cat is present, see confirmed cougars in Illinois. The count of wildlife sightings answers a different question from an injury study.
Leave room for the animal to leave
The National Park Service's mountain lion safety guidance advises against approaching a lion and says to give it a way to escape. It describes mountain lions as generally solitary and especially active around dawn and dusk, while noting that they may be seen at any time. Its guidance also advises walking with others rather than jogging or hiking alone.
The service warns against feeding deer and against approaching carcasses, since a mountain lion may return to a kill. It also advises keeping pets indoors at night. These are ways of avoiding close situations described by the agency, rather than methods of attracting a cat for a better view. A photograph is not worth creating an encounter.
If a lion is encountered, the National Park Service says not to run. It advises facing the animal, making eye contact and avoiding crouching or bending over. Its explanation is that running can stimulate pursuit and a crouched person resembles the shape of prey. It says to appear larger by raising arms or opening a jacket, and to speak firmly in a loud voice.
The Illinois guidance
Wildlife Illinois, the Illinois Department of Natural Resources account, similarly says not to run, surprise or approach a mountain lion. It advises making noise so the animal knows a person is present, staying upright, appearing large and slowly backing away. If people are together, the agency says to gather and move as a group when possible.
The Illinois account suggests entering a building or vehicle if possible. It says to fight the animal off if contact occurs and not to play dead. The National Park Service also says to fight back if attacked, trying to stay standing and face the animal. These directions are the agencies' encounter guidance, rather than a claim that any technique guarantees an outcome.
Wildlife Illinois says an animal that feels trapped or provoked, or that perceives a person as prey, is more likely to attack. That is why its instructions combine respecting space with avoiding running. Do not crowd a cat or try to move closer to decide whether it is nervous. The cougar questions page also covers identification and the state's protected status.
After a bite
Any animal bite needs medical attention; MedlinePlus's animal-bite information explains that infection can lead to serious medical problems and describes medical care when needed. A bite is a health concern regardless of whether the animal was correctly named during the encounter. The rarity of cougar attacks offers no reason to dismiss an actual injury.
The Midwest cougar feature explains why rare visitors can occur without evidence of local breeding. A useful field habit is to keep observation, identification and safety distinct. Respect a distant animal, follow agency advice if the distance closes, and leave conclusions about population status to documented evidence.