I like to watch Deer. As for ticks, I've never seen a tick on a deer, but the Deer Mice have plenty.

Bears? Best way to get rid of them is to mark a tree in their territory. They stretch up as high as they can and claw a tree. When another Bear comes by it will try to reach higher than the one who made that mark. If he can, he will stay. If he can't he will leave knowing that a bigger Bear is in the area. That's how they avoid fighting.

What I do is take a step ladder and an iron garden rake, climb up high on the ladder and claw the tree above the marks the bear made. He left thinking there was a 20 foot Bear in the area.