Abstract: A pair of wing assemblies for attachment to a snow thrower or snow blower employing an impeller within a housing and having a forward opening therein to facilitate the feeding of snow to the impeller. The wing assemblies are pivotally attached to the sides of the housing. In a first operative position, suitable for use after a light snowfall, the wings are positioned so as to diverge forwardly and thus increase the catchment area of the snow to be fed to the impeller, thereby improving the efficiency of operation of the snow thrower. In a second operative position, the wings are positioned so as to diverge rearwardly so as to push snow away from the snow thrower and increase the width of the path cleared. An inoperative third position with the wings folded laterally in front of the snow thrower permits compact storage of the snow thrower without having to remove the wing assemblies.