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How temperature swings impact the growth of young songbirds

phys.org·Paul Arnold·about 1 month ago
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An adult barn swallow perched on a mud cup nest. This image captures the structural features of the nests and a typical barn nest site that are used by the birds in this study. Credit: Sage Madden, CC-BY 4.0 Climate change threatens to cause increasingly extreme and variable temperature swings, affecting everything from urban infrastructure to global food supplies. In the animal kingdom, the hardest hit may be the youngest and smallest songbirds, according to new research. Scientists at the Department of Evolution and Ecology, University of California, Davis, wanted to investigate how temperature affects the growth of baby birds and how factors such as their age, size, and parental care make them more or less vulnerable to the weather. Monitoring nests To find out, the team monitored 31 nests and 113 wild barn swallow nestlings in Boulder County, Colorado, as they detail in a paper published in the journal PLOS One .…

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