I've been seeing a short tail weasel in the backyard the last few days but last nite was the first chance for a pic....

That is a short tail weasel. A least is smaller and no black tip on its tail.

Yup,

X 2.

That is simply So Cool!!!

Wish I had weasels around. They look so cool

WEASEL ID: Then key factor in identification of each species is the tail length in relation to the body length.

Least: Smallest of the weasels, little more than mouse size. Has a very short tail (less than one quarter the combined head and body length nose to base of tail. Tail has no black tip.
Length (head, body & tail): Male 6 ½-8 ½ inches Female 6 ¼-7 ½ inches

Short Tail: Best identified by its black tipped tail that is less than half the combined length of the head and body length, nose to base of tail.
Length (head, body & tail): Male 12 ½-13 ¾ inches Female 9-10 ½ inches

Long Tail: The largest weasel. Tail is also black tipped, but is more than half the length of the combination of the head and body, nose to base of tail.
Length (head, body & tail): Male 16 ½-17 ¾ inches Female 12 ½- 13 ¾ inches

Weasels are small killers.

Yes, sir. If they grew to the size of a big possum, it might not be safe to go outdoors!