A localization system includes an animal transceiver and a floor transceiver circuit. The animal transceiver is configured to be fixed to an animal to transceive a radio frequency signal. The floor transceiver circuit is arranged on a floor surface and configured to determine a position of the animal transceiver within the floor surface on the basis of the radio frequency signal received from the animal transceiver. An animal cage includes a cage configured to accommodate an animal, and the localization system.