Dawson caribou[< G.M. Dawson, 1849-1901, Canadian geologist and surveyor]
an extinct sub-species of caribou (def. 1), Rangifer torandus dawsoni, found only on Graham Island of the Queen Charlotte Islands.
1964  For example, the Dawson caribou seems to have been "on the way out" naturally; man's appearance on the scene only hastened the process slightly.