The term "egér" refers to a type of small rodent commonly known as a mouse. Mice are found in various habitats around the world and are known for their adaptability. They typically have a pointed snout, large ears, and a long tail. Mice are often associated with human environments, where they can be both pets and pests. Mice belong to the family Muridae and are part of the order Rodentia. They play a significant role in ecosystems as prey for many predators, including birds of prey and snakes. Mice are also used in scientific research due to their genetic similarities to humans, making them valuable in studies related to genetics and disease.