Gwen Baluss of the U.S. Forest Service blows on a junco to reveal fat deposits, in Patty Dick's 6th grade class at Blatchley Middle School. (Photo by Bethany Goodrich, Sitka Conservation Society)

Gwen Baluss of the U.S. Forest Service blows on a junco to reveal fat deposits, in Patty Dick’s 6th grade class at Blatchley Middle School. (Photo by Bethany Goodrich, Sitka Conservation Society)