This summer I (involuntarily) had one of the more "interesting" wildlife encounters that I've ever experienced. It's a good demonstration of the reality that when you're dealing with large animals. THEY are in control of the situation, NOT the photographer.
I was shooting with two professional photographers. We are all well seasoned. One of them, the lady who set up the shoot for us(we'll call her Jane), has been shooting brown bears in Alaska several weeks every summer for over 15 years. The other gent(we'll call him John) is a full time wildlife photographer for over 25 years with a little experience with grizzlies but had never been on coastal brown bears before. When shooting in these conditions, there are a few safety rules observed by seasoned wildlife pros.
1) Always stick together. There are no recorded incidents of bears attacking groups of more than two people. Plus the bears are more comfortable if they can keep track of where you are.
2) Pick a spot to set up and be still. Once the animals figure out that you aren't a threat they'll pretty much ignore you and just work around you.
2a) If you do move around, never move directly towards a bear.
3) When shooting on a salmon stream, always leave the bears space to move up and down the banks of the stream. Staying at least 25ft(8m) from the water is advisable.
4) Stand your ground (as a group) if a bear approaches you. "Get large" by standing up side by side.
5) Avoid eye contact with large, dominant animals.
6) NEVER, EVER, EVER, get between a sow and her cubs.
There were two huge boars fishing the stream who appeared to be more or less equals at the top of the hierarchy. One of them is the subject of the thread, hereafter referred to as "Buddy" for reasons that will become evident. Buddy was easily 1000lb (450kg).
1) Buddy fishing. Nikon D810, Nikon 500mm f4; 1/800s,f4, ISO1000
Buddy had consumed 50 or 60 lbs (25kg) of fish and lay down for a nap. After a couple of hours he woke up and began rolling on his back, scratching, etc. "John" decided that he had to get some shots of the antics but Buddy was a good way off and at a bad angle. John convinced us to move (see rule no.2) but he was shooting handheld while "Jane" and I had tripods set up, backpacks, etc. As soon as we agreed he bolted and left us there picking up our gear (see rule no.1).
When we caught up with him, John was set up on to optimize the lighting on Buddy. John had picked a tiny gravel/sand bar in the middle of the creek. When Jane and I arrived and set up, we ended up with me on the left, Jane in center, and John on the right. I was on the point of the bar where the creek split and only 10-12 ft(3-4m) from the water's edge (see rule no.3).
Buddy continued to roll, scratch, etc. for 15 minutes or so.
2) Buddy slowly waking up. Nikon D810, Nikon 500mm f4; 1/800s, f5.6, ISO800
Nap time over, Buddy stood up and walked directly at us. I was shooting with a second full frame body w/80-400mm lens and had to switch to it as he approached. He stopped directly across the creek from us for a drink of water.
3) Nikon D4, Nikon 80-400mm at 310mm; 1/1000s, f8, ISO800
Buddy was so disinterested in our presence that I was having trouble getting a shot of him with eye contact. I finally succeeded.
4) same set up as no.3
For those patient enough to keep reading, there are no more supporting images for the rest of the tale. While looking through the lens I noticed that Buddy kept looking with some interest at something slightly off to my left. I looked over my shoulder to see if there was a bear behind us. Nothing. Then I noticed that the creek to my left was literally chocked bank to bank with salmon. Just as I noticed this, Buddy stepped into the water and headed for the fish. This was bad. We were much too close to the water. OK, maybe he'll catch one and step out on the opposite bank to eat it. Well that was a nice thought....
Buddy caught a salmon and turned our way. We were shooting on our knees for low angles. But by this time the bear was so close that he could interpret our standing up as a threatening move so we sat still (so much for rule no.4). In for a penny... Buddy came over and sat down beside me less than 10ft away. I sat there staring down at the ground (see rule no.5), pulled the pin on the bear spray, and listened to the squishing and crunching as Buddy consumed the fish. I could see Buddy's feet out of the corner of my eye and hoped fervently that when he moved they would not point in my direction. He finished his fish, got up and ambled off after another. As soon as his back was to us and he moved off a few yards we gathered our gear and made a calm but hasty retreat.
Of course when it was all over and we were all none the worse for wear(not even soiled clothing...), it was quite humorous. The bear was dubbed "Buddy", as in my buddy.
I'm glad to say that as a group we did a better job of sticking to the above rules for the remainder of the trip...