Oregon State University. Extension Service; Rulofson, Franz C.; Edge, W. Daniel; Test, Peter ([Corvallis, Or.] : Oregon State University, Extension Service, 1993-06)
The two species of ground squirrels
that may cause severe damage to livestock
forage, field crops, ditches, and
dams in eastern and central Oregon are
the Belding’s (Spermophilus beldingi)
and Columbian (S. columbia ...