Wolves are a crucial part of the wilderness life-cycle and in this amazing You Tube video, you can see what impact removing and then re-instating wolves had in Yellowstone Park.
My childhood picture of wolves was Little Red Riding Hood and The Three Little Pigs, and in some of the Russian fairy tales I heard when I was little--wolves were frightening creatures who carried away and ate little children and disappeared into dark woods.
I hope that you can access this video to see what happens when there is a balance in nature and what happens when that balance is disrupted.
How Wolves Change Rivers
Thank you to "Sustainable Man" and others who made this video.