All domestic rabbits are the same species as the European rabbit, the wild rabbits that you see in fields and hedgerows. Compared to cats and dogs they have only relatively recently been domesticated. This means that in physiology and behaviour they are still very close to their wild cousins.
Rabbits are now the 3rd most popular pet in Britain, although are arguably also the most neglected. They are often confined alone to a small hutch at the back of the garden and basically ignored. They are, however, intelligent, living animals and should be loved and looked after properly.
There are now many different rabbit breeds, some bred for meat (e.g. Californian and New Zealand White), some for fur (Angora, Rex) and some simply as pets. They range in size from the Continental Giant (weighing over 5kg) to the Polish and Netherland Dwarf (weighing less than 1kg).