Center for Conservation Biology

Close up image of a northern spotted owl sitting on a tree branch in daylight

Northern spotted owl

Shasta-Trinity National Forest, California (CCB, UW and USFW Years surveyed: 2009-2011 Related publication: Using Detection Dogs to Conduct Simultaneous Surveys of Northern Spotted (Strix occidentalis caurina) and Barred Owls (Strix varia).)
Photo Credit: Ryan Hepler