Capture data for ecotypes 2 and 5 in South Hills

These are the capture data for the individuals of Red Crossbill (Loxia curvirostra) ecotypes 2 and 5, including the mean bill depth (mm) of each individual used in the analyses. The initial capture date is provided, and birds included in the analyses were only birds that were initially captured between 2009 and 2014. Nearly all captures were made at the site described in the paper - at the base of a cabin in the South Hills (Sawtooth National Forest), Idaho.