Actually, Rabbit, since I finally became a very good tracker, I don't get surprised by much of anything in the wild anymore. I am always reading sign, and listening to the other animals, and bird sounds. When you listen for concentric rings, they will tell you how far away an animal is, what kind it is, where its located, how fast its moving, and where its headed. Sit around the Bear exhbit at the zoo for a few days, just listening to the birds, and other animals when the bears move out into the exhibit. With patience you will learn which are the alarm sounders, and what their alarm calls sound like. You will learn when the alarm changes based on what the bear is doing, how close he is to the alarm caller, etc. Try to get to the zoo early, and see if you can arrange to be allowed into the exhibit area at dawn, even if you have to volunteer to do some work for free to get in. By the time most of us are going to work in the morning, the bears are heading back to sleep. You won't usually see them until just before the late afternoon feeding time. They are much more " natural " in the early morning.
While you are listening, watch how they walk, how they place each foot. If they walk close enough to the spectator area, use binoculars, or a scope to look at the foot impression( track) left by each foot, and then look at the gait pattern. They will usually be walking a slow walking gait. Only when two bears are playing will you see them jog or run. Its worth learning what each of those sets of tracks look like, too.
Unfortunately, you have to go to books to find out what bears are eating at various times of the year, and in various locations. You won't see this at the zoos. Bears are omnivores, and in the early spring, when they first come out of hibernation, they eat large amounts of fresh green grasses to fill their stomach. The new grass is sweet tasting, and actually does have a lot of sugar, which the bear then uses to turn into replacement fat. Bears eat berries in season, so be aware of what berry crops are in season in the area where you are going to hunt or hike. Learn to identify the plants, up close, and from afar. Avoid those areas when fruit is present and bears are in the area. If the deer are fawning, bears will hunt the fawns, and eat the afterbirth, fighting half a dozen species of mammals and birds for that food. Keep a good look out for bears at that time of year, usually April through June. Where fishing is good, you will find bears along the waterways eating fish. In the Fall, they will attack other animals to fill their need for lots of fat to help them survive the winter. Boars are not allowed around their cubs, by the sows. If you see cubs, or any small bear, less than 2 years old, you can bet that its mother is around, and you want to avoid her. Stop, listen, look, listen, and look again. She heard you long before you saw the cubs, and is watching and listening for you. She is trying to wind you so she can identify you by your smell. She will outwait you if you don't have patience. You don't want a sow bear stalking you because she thinks you are a Boar bear after her cubs. If you need to move, make a lot of noise, and people sounds, and move obliquely out of the valley where you see the cubs. The sooner your scent leaves that vale, the sooner she will stop worrying about you. This is when banging pots and pans can be your best weapon.
By all means, employ a guide when going into bear country.He knows these things i have written, and lots more. He knows the country, and has an idea of where bears are, where they are likely to be going, and where its safer to move to avoid them. When the locals find out I track, and read sign, we compare notes and decide what is the best thing to do. I will defer to their knowledge of a local area, but they always want my imput and observations, as I am better at reading sign than they are. They also understand better than most people how useful that skill is. I think they also like the fact that I have spent considerable effort learning everything I can about an area I am going to hunt, and about the lives of the animals that live there. I often know more about the food sources, and food chains of animals than they do. I in turn learn a lot of information from them I didn't know, and am not too proud to say so to them. We usually get along famously, although at some point they want to know how I can read tracks so well!