John was not completely correct about the squirrel I saw two days ago. The Kaibab squirrel is a distant relative of the Abert squirrel- I found out from a national park ranger yesterday that he was the one I saw. He can be identified from his relative by his lighter colored fur. Both squirrels are entirely dependent upon the ponderosa pines for food and habitat. Yesterday we took a side trip to Sunset Crater and Waupatki National Monuments before driving over to the Grand Canyon. There is a 35 mile loop road off of Highway 89 which connects both sites. I mentioned, in a previous posting, the presence of the San Francisco Mountains in the Flagstaff area. We discovered yesterday that the mountains are a large volcanic field with more than 600 hills and mountains. The volcanism has migrated from nearby Williams, Arizona during the past 6 million years.