Modern wendigo's are formed when a man or woman becomes isolated or trapped and has to resort to cannibalism to survive. They can also be created when a warrior offers his soul for the power to defeat a threat to his tribe and then vanishes off into the wilderness.
The last part of their transformation from man to wendigo turns their heart into ice.
A wendigo is pretty hard to identify until it is running full speed at you. However most of them like to play with their food, making noises, snapping branches, running past you so you only see them in the corner of your eye, witing until you finally freak out and try to make a run for it.
How to kill it:Edit
The wendigo has a heart made of Ice which can be shatterd with an iron or silver blade... or you can burn it, melting the heart or shoot it in the chest with a flare gun, but good luck with that because it's reflexes are far better than yours.
Will sometimes lure prey to its cave/home so it doesn't have to hunt, can come in handy when you are trying to kill one.
They can imitate human voices.