Earth Notes - Saving Snags ShareTwitter Facebook Google+ Email A ponderosa pine snag near Camp Navajo, west of Flagstaff. Standing dead trees, or snags, are considered an integral habitat component of cavity-nesting birds and other wildlife in the coniferous forests of the southwestern United States. Listen Listening... / Flagstaff, AZ – Standing, dead trees are important wildlife habitat in the southwest. That's part of the reason why logging them after fires and bark beetle outbreaks has proved so controversial. View the discussion thread.