The coat colouring of the Long Tailed Weasel, like other mammals such as the Jackrabbit, is dependent upon the hours of daylight, eg. tawny & cream to white for the weasel.
Certainly is a great method of camouflage for the changing of seasons but unfortunately for this little mustelid, in Calgary where snow can appear in August and disappear in winter months because of chinooks, etc., it definitely is challenging to maintain their "cloak of invisibility".
This little weasel was easy to spot against the terrain of rocks and brown grass & shrubbery but its speed and erratic behaviour wasn't hindered by a coat "malfunction". Snow should return again soon to the woods and then it will be a matter of watching for dancing portions of snow :)!