The bright lights of big cities could be causing an evolutionary adaptation for smaller eyes in some birds, a new study indicates.
— that were breeding either in urban core or edge habitats in San Antonio, Texas.
Professor Phillips, Dr Jones and collaborators found no differences in body size in the study birds breeding either in urban or edge areas of San Antonio — except in one species: the Painted Bunting. This is a migratory North American bird species that winters in Central America and breeds in the southeastern United States.
“Humans may have some unintended consequences on birds that we don’t realize,” Dr Jones pointed out. “We don’t know if these adaptations could have good or bad consequences for the birds down the road, considering that urban environments aren’t going away anytime soon.” “It is also important to understand how to manage such environments for the birds that maybe aren’t urban adapted.”
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