of red foxes, badgers, and Iberian lynxes. If confronted by a potential threat, a rabbit may freeze and observe then warn others in the warren with powerful thumps on the ground. Rabbits have a remarkably wide field of vision, and a good deal of it is devoted to overhead scanning. The doe (mother) is aware that she gives off scent which can attract predators, so she will stay away from the nest to avoid putting the kits (babies) in danger, returning the nest only a few times a day to feed the kits. Rabbits survive predation by burrowing, hopping away in a zig-zag motion, and, if captured, delivering powerful kicks with their hind legs. Their strong teeth allow them to eat and to bite in order to escape a struggle. The longest-lived rabbit on record, a domesticated European rabbit living in Tasmania, died at age 18. The lifespan of wild rabbits is much shorter; the average longevity of an eastern cottontail, for instance, is less than one year. Rabbits are known to be able to catch fire and spread wildfires, but the efficiency and relevance of this method has been doubted by forest experts who contend that a rabbit on fire could move some meters. Knowledge on fire-spreading rabbits is based on anecdotes as there is no known scientific investigation on the subject. Habitat and range Rabbit habitats include meadows, woods, forests, grasslands, deserts and wetlands. Rabbits live in groups, and the best known species, the European rabbit, lives in burrows, or rabbit holes. A group of burrows is called a warren. More than half the world's rabbit population resides in North America. They are also native to southwestern Europe, Southeast Asia, Sumatra, some islands of Japan, and in parts of Africa and South America. They are not naturally found in most of Eurasia, where a number of species of hares are present. Rabbits first entered South America relatively recently, as part of the Great American Interchange. Much of the continent has just one species of rabbit, the tapeti, while most of South America's southern cone is without rabbits. The European rabbit has been introduced to many places around the world. A recent study found that "the (so-called) Chinese rabbits were introduced from Europe. Genetic diversity in Chinese rabbits was very low." Rabbits have been launched into space orbit. Environmental problems Rabbits have been a source of environmental problems when