Energy efficiency for target tracking in wireless sensor networks is very important and can be improved by reducing the number of nodes involved in communications. We propose two algorithms, RARE-Area and RARE-Node to reduce the number of nodes participating in tracking and so increase energy efficiency. The RARE-Area algorithm ensures that only nodes that receive a given quality of data participate in tracking and the RARE-Node algorithm ensures that any nodes with redundant information do not participate in tracking. Simulation studies show significant energy savings are obtained with implementation of either the RARE-Area algorithm alone or both RARE-Area and RARE-Node algorithms together.