Purchase a reprint of this photo
Photo by Sam Harrel
Jerod Ruedell pulls bird vetch from around willow saplings as he and other Denali Elementary School first graders help to eradicate the invasive weed from Creamer's Field Migratory Waterfowl Refuge on Monday, May 12, 2008. The first grade classes have conducted a year-long research project on the invasive plant and its growth in the boreal forest.