These relations are not so much of the living Caribou as of their bodies after death. The principal avian scavengers in the Windy River area seem to be the Rough-legged Hawk (_Buteo lagopus sancti-johannis_), the Herring Gull (_Larus argentatus smithsonianus_), the Canada Jay (_Perisoreus canadensis canadensis_), and the Raven (_Corvus corax principalis_). These birds are evidently attracted to the vicinity of camps and trap-lines by reason of the numbers of caribou bodies lying about. On their first arrival in late May or early June, before the lakes have opened up and while food in general is scarce, Herring Gulls seem particularly prone to assemble where Caribou have been recently killed. For example, up to June 3 only a handful of these birds had been seen about Windy River. On that day several Caribou were killed, and on June 4 about 100 Herring Gulls had gathered at the scene. Their scavenger activities make it especially necessary to protect the caribou bodies in the way described in the section on _Relations to man_. In a few days one of the bodies (apparently not so protected) had been almost entirely consumed. The Herring Gulls operate locally only from May to September, being absent during the rest of the year. A few Ring-billed Gulls (_Larus delawarensis_) appeared meanwhile and attacked a caribou carcass. The Rough-legged Hawk is far less numerous than the Herring Gull and so is a much less serious scavenger. Now and then, however, it may be noted feeding on a caribou carcass. Even the Long-tailed Jaeger (_Stercorarius longicaudus_) is reported in such a role. The Canada Jay and the Raven are permanent residents and are undoubtedly helped through the inhospitable winter by man-killed Caribou. On the other hand, a good many Ravens fall victims to the fox traps placed about the bodies. Charles Schweder has frequently seen Ravens following Wolves, as if in expectation of a kill. Buchanan remarks (1920: 248) concerning the Reindeer Lake region, that the Ravens “appear to remain in the vicinity of the Caribou herds all th[r]ough winter.” In the Windy River area the Canada Jay became noticeably more numerous in August, after the Caribou had returned from the north. The Ravens and the Rough-legs exhibited a similar increase in September and October. The depredations of these carnivorous birds result to the detriment of the living Caribou in that they virtually force the hunters and trappers to kill a larger number of the animals than would otherwise be necessary. _References._--Hanbury, 1904: 135; Stefánsson, 1913a: 93; Seton, 1929, +3+: 108; Ingstad, 1933: 157-159; Downes, 1943: 228; Banfield, 1951a: 36, 42; Harper, 1953: 28, 60, 62-64, 72, 74, 76. _Relations to miscellaneous animals_