Marsh deer resemble the North American mule deer or blacktail deer. Wild turkeys, blacktail deer, gray squirrels, ground squirrels, skunks, river otter, raccoon, mink, and muskrat. The lower canyons have black bear, blacktail deer, cougar, badger, fisher, and marten. In fact Everts was rescued much farther north, near Blacktail Deer Creek. Throughout the area are blacktail deer, squirrels, chipmunks, rabbits, black bear, cougar, and bobcat. The blacktail shiner feeds primarily on invertebrates. In Texas, the blacktail shiner spawning season is April through September. The blacktail shiner hybridizes with the red shiner ("C. lutrensis") in Texas and in Illinois. The blacktail shiner is of relatively low conservation concern. Blacktail shiners are found in the southern United States west of the Appalachian Mountains. Blacktail shiners feed primarily during the day. The same year, Horner himself found more horned dinosaur fossils at the Blacktail Creek North. Blacktail angelfish cannot be housed with other dwarf angels. In the first year, blacktail shiners reach about . Blacktail Butte is a prominent landform rising from the valley floor.