Time to Head South

This is one of the great sights of October. These geese were in a flock that was five to six times what you can see here I am guessing. Maybe 150 birds. Cody said they were blues when they flew over but on blowing up the picture, the chest looks light with black markings to me. The head seems too dark for a blue goose. I think they are the white-fronted goose, Chen caerulescens. I am ready to be corrected though.