Oh thank you for the information about snake's eyesight! That's one aspect I've haven't delved into yet (along with my "exactly how do snakes do it" current research project). Pretty neat that since rodents are known for marking their areas with urine, their predator developed eyesight that can "see" that urine in the pitch dark....boy nature is impressive isn't it!
Glad you found this thread interesting Sarah! :) I've been tucking all this information away for ages and though it might be fun to put it here and watch it grow as others contributed their own information.