Eliza, there is no documented record of a healthy wolf attacking a man in the US.

2. The Parks service has long advocated carrying a gun when in bear country, but I don't know anyone personally who does- except for a couple of park rangers I used to work with.

3. The only brown bear I have seen in the wild, to date, was in a meadow up by Seward, Alaska- and he was eating dandelions. :)

4. Those large birds with white heads are the American bald eagle, which, of course, is not bald, just whiteheaded. In the photo, you may notice one immature bald eagle also- they don't get their white heads until age four or so.

5. The bald eagle, btw, is not black, but a rich dark brown.

6. In that photo, there are also six ravens. They look more like crows to me but I can't see the bills clearly and they look big enough to be ravens, so I suppose they are. A North American crow is only about a third as large as an American raven. Seamus Kennedy, the other day said that our ravens are very much larger than European ravens.

I agree with your sentiment about studying the wildlife unbeknownst to them. I find these surreptitiously filmed photos fascinating.