Whenever I take images of wild animals, I am concerned about whether my presence causes them any stress. Bighorn sheep, at least the ones I've been around, don't seem to get stressed very easily. I'm still in 2012 on my archiving project, and this images comes from April 10 in Custer State Park. Also shown is a juvenile bald eagle over the Mississippi on January 15. Click on an image to load the corresponding slide show page. These were taken with the 1D Mark II and 500mm lens.