Supplement 1. A data file of daily minimum and maximum air temperatures at Fort Hood, Texas, USA (2004–2007), Carbondale, Illinois, USA (2001–2004), and Queen’s University Biological Station, Ontario, Canada (1996–2000)

File List TempData.txt Description The TempData.txt file is a tab-separated text file. The file contains the raw temperature data for study sites in Texas, Illinois, and Ontario. Column definitions: 1 = location (IL, TX, or ONT) 2 = Month 3 = Average minimum daily temperatures (°C) 4 = Standard errors of average minimum daily temperatures (°C) 5 = Average maximum daily temperatures (°C) 6 = Standard errors of maximum daily temperatures (°C)