The term 'Large Land Mammal' can be summarized by the crossword solution of ELK, which is a three-letter word. ELK are large mammals that inhabit temperate and boreal forests in North America, Europe, and Asia. They are the second largest species of deer in the world, with males weighing up to 700 pounds. ELK are herbivores, and their diet consists mainly of grasses, leaves, and bark. They are also known for their impressive antlers, which can reach up to five feet in length.