The useful Turkey Vulture rarely visits the park. When it makes an appearance, we generally see it from below, and its featherwork appears all black, or very dark. On December 18, this individual settled in the grass in the Nature Area just across the paved walkway from the Open Circle Viewpoint. Taking advantage of a brief spell of morning sun, it spread its wings, and revealed that, contrary to appearances, the feathers on the lower or outer part its wings are grey and even white.
This respite did not last long. Within minutes, traffic by featherless bipeds and quadrupeds approached. The bird reconsidered its position and moved on.
There is much to read of interest about this bird in Wikipedia.