A "Naturally Occurring" snowman; a snowman that is actually a frozen person found buried in the snow for any amount of time.
A Siberian Snowman is not the kind of snowman one would desire to find, although, they do still count as snowmen and anyone who finds one can claim the remains as an achievement as they can be very difficult to discover.
"Babushka! Babushka! Jakob was out, digging in the snow when he found a hand sticking out from the ground!"
"Mmmm da grandchild of mine, my sweet Jakob seems to have found a Siberian Snowman! What a lucky boy he will grow up to be!"