I believe this is Condor 523
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@mattgrosso got photos in which you can actually see that it's a condor. (they aren't up yet).
Just sitting there a few feet from the observation deck at Mathers Point. Couldn't care less about the crowd it drew.
The California Condor (Gymnogyps californianus) is a New World vulture, the largest North American land bird. This condor became extinct in the wild in 1987 (all remaining wild individuals were captured) but has been reintroduced to northern Arizona and southern Utah (including the Grand Canyon area and Zion National Park), coastal mountains of central and southern California, and northern Baja California. Although other fossil members are known, it is the only surviving member of the genus...