Earth Notes - Saving Snags TweetShareGoogle+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. TweetShareGoogle+EmailView the discussion thread.