A tunnel of aspen trees, on a road alongside North Lake, Populus tremuloides

A tunnel of aspen trees, on a road alongside North Lake.  The aspens on the left are still green, while those on the right are changing to their fall colors of yellow and orange.  Why the difference?. Bishop Creek Canyon, Sierra Nevada Mountains, California, USA, Populus tremuloides, natural history stock photograph, photo id 23384
A tunnel of aspen trees, on a road alongside North Lake. The aspens on the left are still green, while those on the right are changing to their fall colors of yellow and orange. Why the difference?. Bishop Creek Canyon, Sierra Nevada Mountains, California, USA

Species: Quaking Aspen, Populus tremuloides
Location: Bishop Creek Canyon, Sierra Nevada Mountains, California
Image ID: 23384
Format: Digital 3:2
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