Yellowstone wolves that once roamed freely have declined in numbers. Wolves are key species in their ecosystem. A keystone species is an animal that, if it disappears, creates problems in an ecosystem. Yellowstone was established to reserve beautiful land and protect the animals that live there. Yellowstone wolves should be protected from hunting and human interference. Wolves live in family packs and roam large areas. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay Wolves live in an area most of the year where they can hunt moose and moose. They go up and down mountain heights in search of prey. In winter they partially migrate in search of food. From January to February they mate. The habits of wolves are mainly based on their eating habits. As a keystone species, wolves, as predators, directly influence what they eat. Wolves eat moose and elk when they are plentiful, but they also eat smaller prey such as rabbits. When moose populations get out of control, they graze on the land and eat beneficial plants. Yellowstone wolves, when reintroduced, reduced the size of their prey populations similarly to wolves on an island: "wolf restoration will have similar effects to some extent, reducing the density of moose and coyotes" (McCafferty , Predator, and prey). Wolves affect the population density of elk and elk. Moose populations show the change in wolf populations, which have fluctuated over the years. Yellowstone wolves have been critically endangered and have been reintroduced to Yellowstone. Wolves live in a variable climate, some of which is found in snow. This means they have large, full coats. Hunters and trappers have exploited the lush fur for hundreds of years. The fur trade has been going on for years since the beginning of America. The fur trade has reduced wolf populations for years. Hunting has been banned to allow wolf populations to recover. In recent years, wolf hunting has been permitted again: "gray wolves in the northern Rocky Mountains were removed from the endangered species list and became a legal hunt for the first time in decades" (McCafferty Predator and Prey) . Wolves are back in numbers, but hunting isn't the only thing standing in the way of the wolves' full return. Wolves need large areas to roam in the winter. Humans have torn that space apart, creating homes, ranches, farms, highways, and cities. Wolves are in the same area as humans: “Whatever the reasons, humans are at war with wolves. It's all an ancient dispute over territory and food between their clans and ours, and its battlefield stretches across the northern Rocky Mountain states and to the door of my remote cabin near Montana's Glacier National Park. A young woman named Diane reported the spot by peeing on the porch carpet." Major highways from Yellowstone to Canada have divided breeding grounds for moose, bears and wolves. Major highways are not easy passages for these animals. Cars that pass cross the 6 lanes in both directions making it impossible to cross these roads. The animals that cross are hit by cars and cause serious accidents. It is not easy for these animals either other animals and these animals are easy prey. They are forced to stay in enclosures and have no escape from wolves and coyotes. Farmers, to protect their livelihood,.they kill wolves that invade their territory. After the reintroduction of wolves, the problem increased. Farmers are forced to monitor their animals more than before. Even the houses that frequent these farms fear for their safety. Wolves will eat their pets and terrorize their children. Wolves are returning to territory known hundreds of years ago. Wolves, as a keystone species at Yellowstone Park, influence the environment around them. Wolves keep other populations in check. Wolves eat moose and elk. Moose and moose are grazing animals. They eat grasses, berries and other ground plants. These large animals eat large amounts of food throughout their lives. Without wolves pushing them into other territories, these animals will overgraze. When they overgraze, they don't just remove plant species that they take home from other animals. Birds will have nowhere to land if their trees cannot pollinate because their fruit has been eaten by overgrazing by moose and moose. Rabbits will be eaten by hawks in greater quantities because their cover has been eaten. Mice and other small rodents suffer the same fate. The disappearance of these animals also represents a problem for humans. Yellowstone was a land set aside for nature preservation. This preserved land is there to be seen: “Today the wolf helps maintain a natural balance in the northern Rockies by forcing elk to vary their grazing patterns, which allows crucial riverside vegetation to remain robust; and keeping the coyote population under control, which in turn benefits the pronghorn antelope and red fox” (Albu, Wolf Pact). If the wolves died there would be no more wolves to see when people visit Yellowstone. Grazing land will also pose a problem for visitors. The beautiful flowers will have been mowed down by the abundance of moose. There will be fewer birds because birds will not be able to eat the seeds of plants and trees. Moose are also large animals that could crush a car if it were hit by one. Wolves keep elk in check, which in turn helps keep Yellowstone's beauty intact. If the wolves are not saved there will be consequences. The main impact on wolves is humans. Humans develop and invade the territory of animals. Every year for thousands of years the human population has been growing exponentially, requiring more and more land. As humans occupy more land, they limit the amount of land available to other animals. Humans also need transportation from one place to another, so they build roads and highways that cut through large swaths of land. The wolves took part in several plans to help them. Wolves were initially studied over long periods of time. The first studies to trap them have begun. These early studies gave researchers data to compare to see trends in wolf population density. Wolves were placed on the endangered list because there has been a significant and measurable decline in the population. They were bred in captivity and moved within Yellowstone to increase the population density in Yellowstone. Yellowstone National Park is a large amount of land set aside by the government to preserve the land it sits on. There are parks around the world similar to Yellowstone. Large animals need large amounts of land to travel on. Moose, moose and bears need large areas of movement. Wolves are predators of moose and moose. They wander with their prey on.