Wolves also have keen eye sight and are quick to detect the slightest movement of anything in front of them. Being major predators, their eyes are on the front of their heads, and they have probably a little less than 180-degree vision, unlike their prey species, which can see over 300 degrees of a circle. Nighttime vision for wolves is many times better than human vision in the day or night. Wolves can actually see much better and even much more clearly at night. (http://www.wolfsource.org/?page_id=70)

Most wolf pups are born with blue eyes, which gradually change to a yellow-gold color by eight to sixteen weeks, though sometimes their eyes can change color much later. Occasionally, a mature wolf will be found with blue eyes. (http://www.wolfcountry.net/information/WolfPup.html)