An animal lair is a natural or man-made refuge used by different species of wildlife. Some synonyms for animal lair include den, burrow, lair, hole, nest, lodge and sanctuary. A den usually refers to a cave-like structure used by predators, while a burrow is a tunnel system dug by small mammals like rabbits. A lair is a hiding place where animals may give birth or raise their young. A hole typically refers to a small opening used by rodents and reptiles. A nest is a place where birds lay their eggs and raise their young. A lodge is a term applied to the dwellings of beavers, while a sanctuary is a place where animals can live safely in the wild.