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. 2020 Feb 25;10:3409. doi: 10.1038/s41598-020-60122-2

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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20^th century precipitation and temperature windows. Temperature (a) and precipitation (b) data collated from all known breeding sites throughout northern and southern distributions (z-axis) shape the climate windows for these regions. Each window is formed by a regional mean and standard deviation (±1) value calculated using PRISM annual values based on 1900–2000 data. During our study period, precipitation and temperature deviations in the southern distribution have remained outside of 20^th century windows since 2012. Mean 2070 predicted values are presented as dashed horizontal lines and are based on estimates from CCSM RCP 6.0 data.