From our camp, a mile or so distant, Caribou in bands of approximately the following numbers were observed using this crossing-place during the early part of June: June 1--7, 10, 18, 20, and several other bands of unrecorded size; June 2--10, 3, 7; June 3--4, 4, 10, 30, 70, and others; June 4--3, 40?; June 5--40, 50, 75; June 6--25; June 10--8. Of course many others must have passed while our attention was elsewhere engaged. In most cases my records indicate the time of day when the bands were crossing Windy Bay. The periods were mainly from 10 to 11 a.m., from 2:30 to 5 p.m., and in the evening. Perhaps the infrequency of midday passages was due to the habit of the Caribou of resting at this period. One of the last bands to pass during the evening of June 1 consisted of about 20 individuals. Two big bucks were in the lead, and apparently a few others were scattered along the line. At the very rear was a big, extra-dark buck, immediately preceded by a yearling barely half its size. In crossing the bay ice, the animals traveled habitually in long files, one after the other, and yet not altogether in single file. In watching the endlessly interesting spectacle from camp, we could not always count the individuals exactly, for here and there a few would get abreast of others and be partly concealed. The general formation of each band was that of a much strung-out procession. For the most part the animals progressed at a moderate walking gait; there were no flies to spur them on at this season. On one occasion the forward element of a large band was actually running, but those in the rear were going calmly, and there was no visible cause of alarm. At mid-morning of June 6 most of a band of 25 were lying down to rest on the bay ice, while a few remained standing. Meanwhile Caribou in some numbers were advancing northward by crossing Windy River, the ice on which did not break up generally till June 14. On June 3, for example, as I peeped out of my tent at 4 a.m., there was a band of about 15 making a crossing a quarter of a mile above camp. Late in the afternoon several dozen did likewise close to the same place. At this period I did not get farther upstream to note how many might be passing there. On June 14, while the river ice was breaking up but while the bay ice was holding firm, two bucks moved about on the latter, just off the river’s mouth. They appeared to be seeking a safe crossing. The smaller of the two almost invariably preceded, just as if it were aware that it would be less likely to break through than its companion. For the most part they walked rather sedately, but now and then took up a very leisurely trot. On the following day a dozen crossed Windy Bay at about the same place. These were the last ones seen on the ice in June. Though the ice remained on the bay for some days longer, it had evidently become unsafe.