Probably the best rule of thumb would be right after the snows melt, when the grasses are knocked down visibility is optimum. If your weather is anything like what we're having here in Elmira,ny- no snow cover_ I'd start now looking in thickets along the highways especially where perenially there are a number of road kills. The antlers you find may not be sheds, but hey, antlers are antlers. CROKIT