Elk (Cervus canadensis).
These herbivores are tenacious browsers who feed on grasses and sedges in the summer and migrate to forested areas where they eat tree matter such as twigs, bark, and acorns. These large members of the deer family usually live in herds of 10 to 20 members of the same sex, but during their spring migration herds of both sexes join together forming massive herds numbering in the thousands. They can be found in large parts of North America, as well as in Asia, Europe, and Africa. .