The first day I was in the Yellowstone I was riding along the upland beyond Blacktail Creek with T. E. Hofer. Miles away to the southeast we saw some white specks showing, flashing and disappearing. Then as far to the northeasterly we saw others. Hofer now remarked, "Two bunches of Antelope." Then later there were flashes between and we knew that these two bands had come together. How?
When you have a chance in a zoo or elsewhere to watch Antelope at short range you will see the cause of these flashes. By means of a circular muscle on each buttock they can erect the white hair of the rump patch into a large, flat, snow-white disc which shines in the sun, and shows afar as a bright white spot.
XX. Near Yellowstone Gate: (a) Antelope
Photo by F. Jay Haynes
(b) Captive Wolf
Photo by E. T. Seton
XXI. Mountain Sheep on Mt. Evarts
Photo by E. T. Seton