Charles Schweder reported as follows on the food of Caribou. In summer they live chiefly upon leaves, especially those of dwarf birch, and to some extent upon “grass” (probably largely sedges). Toward the last of June a Caribou was killed with fat an inch thick on its haunches--perhaps the effect of recent feeding on the fresh green vegetation. In August and September the animals also eat mushrooms and get very fat on them; they seem to be especially fond of a certain red kind, which Charles has found in their stomachs. The Eskimos’ name for mushrooms signifies “deer food.” The Caribou feed upon dead “grass” (perhaps mostly sedges) in the fall, but not in the winter. Charles has seen them digging through 4 feet of snow to get at the reindeer lichens; but for the most part their winter feeding in this region is on the tops of the hills, which remain bare. They also eat tree lichens, especially in the winter time. Charles has seen Caribou chew the cud while standing as well as while lying down. He once saw a buck thus occupied while standing on a hill for half a day in a breeze that kept the mosquitoes down. Among the hundreds of Caribou observed at the river crossings and elsewhere, I do not recall seeing a single one pause to drink. The _Influence of food supply on distribution_ of the Barren Ground Caribou has been discussed in a previous section. _References._--Hearne, 1795: 317; Franklin, 1823: 242; Richardson, “1825”: 329, and 1829: 243; Godman, 1831, +2+: 284; Richardson, in Back, 1836: 498, and 1861: 275; Murray, 1858: 202; B. R. Ross, 1861: 439; Kumlien, 1879: 54; J. B. Tyrrell, 1894: 441; Russell, 1898: 226; J. W. Tyrrell, 1908 (1898): 80; Lydekker, 1898: 49; Elliot, 1902: 276; Stone and Cram, 1904: 53; Buchanan, 1920: 105-106, 131; Hewitt, 1921: 61; Blanchet, 1925: 33; Seton, 1929, +3+: 107-108; Kitto, 1930: 87; Jacobi, 1931: 223; Harper, 1932: 30; Sutton and Hamilton, 1932: 84; Weyer, 1932: 39; Hornby, 1934: 105; Murie, 1939: 245; Clarke, 1940: 106-107; G. M. Allen, 1942: 299; Soper, 1942: 143; Downes, 1943: 228; Porsild, 1943: 383; R. M. Anderson, 1948: 15; Manning, 1948: 26-28; Rand, 1948a: 212; Harper, 1949: 230; Banfield, 1951a: 11, 19-20, 28-29; Barnett, 1954: 106. _Scatology_ The pellets of the Caribou are small, more or less blackish, very irregular in shape, somewhat compressed, and generally deposited in little piles, in which the individual components do not stand out very distinctly, being pressed against each other. They are quite unlike the oblong, curvilinear, comparatively symmetrical scats of the White-tailed Deer and the Moose. I did not observe, nor learn of, any particular seasonal variation in the shape or other characters. _References._--Sutton and Hamilton, 1932: 81; Manning, 1943a: 50. _Voice_