help a sister out, Frack

Okay J, i tried to do an image search to figure out what the cool big white bird with the grey head from the last post might be, but i kept finding things like this:

http://cs.birdwatchingdaily.com/brdcs/blogs/field_of_view/2009/10/09/scenes-from-necedah-and-the-international-crane-foundation.aspx

and pictures of ibis and Siberian cranes that are obviously not the right species.
Could you please tell us what kinda bird it was.
Thanks so much.