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Figure 9 from Franklin, et al. 2021

By Forest and Rangeland Ecosystem Science Center
line plots depicting increasing barred owl and decreasing northern spotted owl occupancy at nine study sites
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Detailed Description

Trends in territory occupancy for northern spotted owl pairs and barred owls on 11 study areas in Washington, Oregon, and California based on two-species occupancy models from 1993–2018.

Sources/Usage

Used with permission from the journal Biological Conservation.

Range-wide Declines of Northern Spotted Owl Populations in the Pacific Northwest- A Meta-Analysis
Franklin, A.B., Dugger, K.M., Lesmeister, D.B., Davis, R.J., Wiens, J.D., White, G.C., Nichols, J.D., Hines, J.E., Yackulic, C.B., Schwarz, C.J., Ackers, S.H., Andrews, L.S., Bailey, L.L., Bown, R., Burgher, J., Burnham, K.P., Carlson, P.C., Chestnut, T., Conner, M.M., Dilione, K.E., Forsman, E.D., Glenn, E.M., Gremel, S.A., Hamm, K.A., Herter, D.R., Higley, J.M., Horn, R.B., Jenkins, J.M., Kendall, W.L., Lamphear, D.W., McCafferty, C., McDonald, T.L., Reid, J.A., Rockweit, J.T., Simon, D.C., Sovern, S.G., Swingle, J.K., Wise, H., 2021, Range-wide Declines of Northern Spotted Owl Populations in the Pacific Northwest- A Meta-Analysis: Biological Conservation, v. 259, no. July 2021, p. 109168, https://doi.org/10.1016/j.biocon.2021.109168.