Banded young, sex uncertain. 04/03/98, definitely male, paired and copulating with female 34R at Bong Bridge, Duluth MN, according to Dave Evans, nest failed around June 1; 2005, same place, paired with female 1807-35772, 1 egg, not incubated. 2006: Bong Bridge - new location closer to land on the MN section of land on a beam of the bridge, paired with female *Y/6, 2 males were banded when they landed below the bridge at 30-35 days of age. 1 young found dead on the bridge 7/9/06 by Dave Evans. 2007: same pair, same site. attempted nesting on bridge but pair failed. Pair moved to nearby smokestack but eggs failed to hatch. 2010: new female b/g *R/*U, same site. eggs laid but did not hatch. 2011: same pair, same site, three chicks produced. 2012: same pair, same site, three chicks produced.