Black wildebeest
Black wildebeest act as hosts to a number of external and internal parasites. A study of the animal in Karroid Mountainveld (Eastern Cape Province, South Africa) revealed the presence of all the larval stages of the nasal bot flies "Oestrus variolosus" and "Gedoelstia hässleri". The first instar larvae of "G. hässleri" were found in large numbers on the dura mater of wildebeest calves, specially between June and August, and these later migrated to the nasal passages. Repeated outbreaks of mange (scab) have led to large-scale extinctions. The first study of the protozoa in blue and black wildebeest showed the presence of 23 protozoan species in the rumen, with "Diplodinium bubalidis" and "Ostracodinium damaliscus" common in all the animals.
Popo Agie Wilderness
Over 300 lakes and several tributaries of the Wind River are located in the wilderness. Rare reports of wolves have been documented and are considered to be from the wolf recovery efforts commenced in the late 20th century in Yellowstone National Park to the north. Additionally, reports of grizzly bears have been documented but they too are rare. Black bears, moose, elk, and pronghorn are the more commonly sighted megafauna. Trumpeter swans, bald eagles, hawks, and falcons inhabit the wilderness, especially near lakes and streams. Eight species and subspecies of trout, including a few found only in the Yellowstone region exist as well. The forest is dominated by lodgepole pine and Douglas fir, Engelmann Spruce, and subalpine fir at higher elevations up to the tree line.