Report
Barn owls grow lighter or darker over generations in some places
SciTechDaily reports that the advantage behind their changing feathers may involve coping with stress rather than color itself.
TLDR
A post says barn owls are becoming lighter or darker over generations in some places, citing DNA from more than 3,000 birds as evidence of natural selection. It links the shift to their environment but says scientists are still sorting out the advantage. SciTechDaily reports that the advantage may involve coping with stress rather than feather color itself.
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