Linearly distributed along Basin Hollow Creek for more than than 0.8 mi (1.3 km), the center of this breeding colony is located on the south side of Whitmore Road, 4.6 miles northeast of the village of Millville, Shasta County, California.
|Record||Observation Date||Observer||Number of Birds||Data Source|
|Data||2017-04-08||Dan Greaney||0||Statewide Survey, 2017 (unpublished)|
|Data||2014-04-18||Steve Royce||0||Statewide Survey, 2014 (unpublished)|
|Data||2011-04-16||William E Haas||2050||Statewide Survey, 2011 (unpublished)|
|Data||2008-04-27||William E Haas||2000||Statewide Survey, 2008 (unpublished)|