They studied the ranges of all the birds, looking for geographic patterns of bird evolution. (sciencemag.org)
And there was no clear geographic pattern to the diversity: Two populations living close together could be as different from each other as from one hundreds of kilometers away. (sciencemag.org)
The atmospheric circulation response seems to be sensitive to the magnitude and geographic pattern of sea - ice loss and, in some cases, to the background climate state. (nature.com)