A successful ground nesting by Swainson's Hawks, Buteo swainsoni, is reported for central Utah. Unusual aggressive nest defense behavior is described for this ground nesting pair.
Woffinden, Neil D. and Mosher, James A.
"Ground nesting and aggressive behavior by the Swainson's Hawk (Buteo swainsoni),"
Great Basin Naturalist: Vol. 39
, Article 7.
Available at: http://scholarsarchive.byu.edu/gbn/vol39/iss3/7