Supplement 1. R code for estimating thresholds while accounting for variable detection and data for estimating thresholds for forest birds, Oregon, USA, 2007–2008.

File List Supplement_Avian data.csv<br> Supplement_R code.r Description The Supplement_Avian data.csv file contains data on stand-level habitat covariates and visit-specific detections of avian species, Oregon, USA, 2008–2009. Column definitions Stand id Percent cover of conifer species Percent cover of broadleaf species Percent cover of deciduous broadleaf species Percent cover of hardwood species Percent cover of hardwood species in a 2000 m radius circle around each sample stand Elevation (m) of stand Age of stand Year of sampling Visit number Detection of Magnolia Warbler on Visit 1 Detection of Magnolia Warbler on Visit 2 Detection of Orange-crowned Warbler on Visit 1 Detection of Orange-crowned Warbler on Visit 2 Detection of Swainson’s Thrush on Visit 1 Detection of Swainson’s Thrush on Visit 2 Detection of Willow Flycatcher on Visit 1 Detection of Willow Flycatcher on Visit 2 Detection of Wilson’s Warbler on Visit 1 Detection of Wilson’s Warbler on Visit 1 Checksum values are: Column 2 (Percent cover of conifer species – CONIFER): SUM = 5862.83<br> Column 3 (Percent cover of broadleaf species – BROAD): SUM = 7043.17<br> Column 4 (Percent cover of deciduous broadleaf species – DECBROAD): SUM = 5475.17<br> Column 5 (Percent cover of hardwood species – HARDWOOD): SUM = 2151.96<br> Column 6 (Percent cover of hardwood species in a 2000 m radius circle around each sample stand– HWD2000): SUM = 3486.07<br> Column 7 (Stand elevation – ELEVM): SUM = 83240.58<br> Column 8 (Stand age – AGE): SUM = 1537; NA indicates a stand was harvested in 2008<br> Column 9 (Year of sampling – YEAR): SUM = 425792<br> Column 11 (MGWA.1): SUM = 70<br> Column 12 (MGWA.2): SUM = 71<br> Column 13 (OCWA.1): SUM = 121<br> Column 14 (OCWA.2): SUM = 76<br> Column 15 (SWTH.1): SUM = 90<br> Column 16 (SWTH.2): SUM = 95<br> Column 17 (WIFL.1): SUM = 85<br> Column 18 (WIFL.2): SUM = 85<br> Column 19 (WIWA.1): SUM = 36<br> Column 20 (WIWA.2): SUM = 37 The Supplement_R code.r file is R source code for simulation and empirical analyses conducted in Jones et al.