The Birds

I count 17 crows (actually, Common Ravens) flying around the dome of the 4-m Mayall telescope in this image. They were out in large numbers yestereday afternoon, presumably enjoying the thermals. I think I must have seen at least 25 or 30 crows at one time or another as they flew around the mountain top. This image was taken at 70mm focal length with an exposure of 1/400 seconds at f/11, ISO 400.