Supplementary material for the manuscript "Flexibility in the timing of avian egg-laying in relation to climate"

· Appendix S1 – Names of institutions and persons associated with the collection or maintenance of breeding observations. · Appendix S2 – Table of 146,009 occurrence records which includes the biome, observed 30-day Tmin, Tmax, and precipitation, and 2-year average Tmin, Tmax, and precipitation. · Appendix S3 – Species level climatic averages and results from paired t-tests.