Often they do, but keep in mind that many of these tributaries are also
thermally altered. At any rate, fish that have moved into tributaries
return frequently to the Firehole River itself—perhaps seeking additional
food. After all, plentiful food is one reason that larger wildlife also
live around this river.
Ms. DeRama, didn’t you report seeing a bison named Rosie in the
Old Faithful area?
Yes, but that has nothing to do with this discussion! Rosie wasn’t
near the river when I saw her—and there was plenty of food available