Near today's Williston, North Dakota, on April 22, 1805, Meriwether Lewis took a morning walk:
I asscended to the top of the cutt bluff this morning, from whence I had a most delightfull view of the country, the whole of which except the vally formed by the Missouri is void of timber or underbrush, exposing to the first glance of the spectator immence herds of Buffaloe, Elk, deer, Antelopes feeding in one common and boundless pasture.
Later the same day he got out of his boat for another stroll.
Walking on shore this evening I met with a buffaloe calf which attatched itself to me and continued to follow close at my heels untill I embarked and left it. it appeared allarmed at my dog which was probably the cause of it's so readily attatching itself to me.
As usual, the captains and their men were attentive students of wildlife behavior.
Capt Clark informed me that he saw a large drove of buffaloe pursued by wolves today, that they at length caught a calf which was unable to keep up with the herd. the cows only defend their young so long as they are able to keep up with the herd, and seldom return any distance in surch of them.