Territories left vacant by the death of an adult are filled quickly by young transients. Illinois bobcats have a high survival rate once they reach a year old. They're protected by closed hunting and trapping seasons. Most deaths are caused by vehicles. Predation is rare, but kittens are killed occasionally by coyotes, domestic dogs, hawks, and owls.
Bobcats are curious animals, zig-zagging to investigate objects that catch their attention.
They usually move at a walk or trot. Dirt roads, railways, and game trails are common travel routes between hunting and resting places. Bobcats rely heavily on their keen sight and hearing to locate prey. Prey that are missed on the first pounce are seldom chased for more than a few yards. Bobcats are usually quiet but can make low growls or high-pitched screams.