Data and R scripts for: Barton, G.G. and B.K. Sandercock. Long-term changes in the seasonal timing of songbird migration on the Pacific flyway. Condor, in press The archive contains two datafiles as comma-delimited files and three R scripts that were used for the analyses. 1) DATAFILE CaptureData.csv = A comma-delimited file with the capture data for songbirds at the Coyote Creek banding station, San Jose, California, 1987 to 2008. BandNumber = unique band number for each bird, 4-digit prefix and 5-digit suffix SpeciesCode = AOU species codes for the study species. OCWA = Orange-crowned Warbler SWTH = Swainson's Thrush, WEFL = Pacific-slope Flycatcher (formerly Western Flycatcher WIWA = Wilson's Warbler YWAR = Yellow Warbler Age-class = USGS age codes 0 = unknown age-class 1 = after-hatch-year (AHY) or adult 2 = hatch-year (HY) or immature 5 = second-year (SY) or yearling Sex-class = sex F = female M = male U = unknown Yr = year of study 1987 to 2008 Season fall = July to November (5 mos) spring = February to June (5 mos) JulianDay = day of year for capture 1 to 365 2) DATAFILE WeatherData.csv = A comma-delimited file with monthly or bimonthly averages for three climatic indexes, 1980 to 2009 MEI = Multivariate El Nino/Southern Oscillation Index, NAO = North Atlantic Oscillation index, PNA = Pacific/North American index Yr = year of data for climate index 1980 to 2009 NAO_AM,NAO_May,NAO_MJ = NAO index, April/May, May, May/June MinT_AM,MinT_May,MinT_MJ = Min temperature, April/May, May, May/June Cprec_AM,Cprec_May,Cprec_MJ = Cprec, April/May, May, May/June MEI_JA,MEI_AS = MEI index, July/August, August/September NAO_Jul,NAO_Aug = NAO index, July/August PNA_AS,PNA_S,PNA_SO = PNA index, August/September, September, September/October MinT_AS,MinT_S,MinT_SO = Min temperature, August/September, September, September/October Cprec_AS,Cprec_S,Cprec_SO = Cprec, , August/September, September, September/October NAO_Mar,NAO_MA,NAO_Apr = NAO index, March, March/April, April PNA_Mar,PNA_MA,PNA_Apr = PNA index, March, March/April, April MEI_FM,MEI_MA = MEI index, February/March, March/April 3) R SCRIPT SpringMigration.R = an R script for spring migration, quantile regression and modeling median arrival vs. climatic indices Filters censor some years, the month of January, and any HY birds Analyses are repeated for the five study species (OCWA, SWTH, etc.) Filters restrict the data set to each species, and then run quantile regression with five quantiles (0.1 to 0.9) Table of quantile results is output as a doc file. The script then compares the median arrival date per year versus different climatic indices, in a model selection framework. AIC is used to rank the different models. Median arrival is plotted against annual variation in the climatic indices. 4) R SCRIPT AutumnMigration.R = an R script for fall migration, quantile regression and modeling median arrival vs. climatic indices Filters censor some years, and the month of December Same analyses as for spring migration 5) R SCRIPT WeatherAnalysis.R = an R script for analysis of climate variables Test of linear models for long-term change in the climate indices. Pairwise correlations to test for relationships among the different climatic indices.