The last 2 years have seen unprecedented growth in bear population in Northern California and the Rocky Mountain areas.  As spring approaches, tourists are warned to wear small bells on their clothing while hiking in bear country.  The bells warn away most bears.  Tourists are also cautioned to watch the ground for bear droppings so as to be alert for the presence of Grizzly bears.  One can easily identify the droppings- they have small bells in them.