Because it was winter, there weren't any active animals to be found in the forest; most of them would likely be hibernating or hiding at this time. There weren't any large animals in this forest, which was information provided by the factory security guards. For Jimmy, this was good news. A brown bear in the area would have been trouble for him.
Jimmy's Heart Eye had a limited range, approximately 50 to 60 meters in practice. Although this distance was more than sufficient for his revolver combat, it was a bit inadequate for searching for people.
In such a vast expanse of woods, Jimmy's search efficiency was only slightly better than the average person's, requiring him to run around and use Heart Eye to cover other areas. In over half an hour, he couldn't cover much ground, but Jimmy left the forest early for the safety of his car—he couldn't stay there too long.