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).

<h2>File List</h2><blockquote> <p><a href="TempData.txt">TempData.txt</a></p> </blockquote><h2>Description</h2><blockquote> <p>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.</p> <p>Column definitions:</p> <p>1 = location (IL, TX, or ONT)</p> <p>2 = Month</p> <p>3 = Average minimum daily temperatures (°C)</p> <p>4 = Standard errors of average minimum daily temperatures (°C)</p> <p>5 = Average maximum daily temperatures (°C)</p> <p>6 = Standard errors of maximum daily temperatures (°C)</p> </blockquote>