Christopher Hill wrote:

> Alpine choughs (Coracus graculus) has been seen at 27,000 feet on Mt.
> Everest. Although there are records of birds migrating at heights up to
> nearly 20,000 feet, I've never seen any reports of another species than
> the chough at that altitude. Choughs are crow-like birds - black, about
> the same size, but with thinner, colored bills. Could you tell anything
> about the color or shape of the bird you glimpsed?

I would guess that it was dark in color, and had the appearance of a raven
or crow but that could have been due to the lighting. It was soaring, and I
have no idea on the size.

The program was on PBS (Nova) title was "The Death Zone."

Jerry Converse
Grand Coulee, WA