A WSN is a network formed by large number of sensor nodes which are randomly deployed in a region. There is an
issue of limited source of power in a node and in fact battery of node cannot be replaced. Wireless sensor network consists of
sensor nodes which are powered by battery; to communicate with each other for environment monitoring because the energy
efficiency is foremost issue in the wireless sensor networks. Therefore, some routing techniques have been developed to
maximize network lifetime and to also attain the maximum reliability as well as scalability. In this paper, we present a
comparative survey of descendant of LEACH hierarchical routing protocol. The objective of this paper is to compare some
features of LEACH protocol variants and provide brief detail of some LEACH improved versions
