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. 2014 Dec 17;1(4):140346. doi: 10.1098/rsos.140346

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© 2014 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — Location of wintering northern flickers by sex obtained from band recoveries and geolocator data. The shaded regions indicate average snowfall of more than 91.4 cm from 1961 to 1990 in the USA. Snowdepth was obtained from data from the National Oceanic and Atmospheric Administration's (NOAA) National Climatic Data Center (NCDC). Flickers tended to winter in regions with little snowfall and females wintered at significantly higher latitudes on average than males. Squares, male; filled circles, female; crosses, unknown.