These datasets were used in analyses for the following publication: Stephens, J. L., and S. M. Rockwell. 2019. Short-term riparian restoration success measured by territory density and reproductive success of three songbirds along the Trinity River, CA. The Condor: Ornithological Applications. Territory density and size data from 3 riparian songbirds at 4 reference and 6 restoration sites along the Trinity River in northern California, collected by Klamath Bird Observatory in partnership with the Trinity River Restoration Program from 2012-2015. Nest monitoring data for these species were collected at a subset of 1 of the reference sites and 3 of the restoration sites over the same time period.