Given the adoption of RDS estimation by the World Health Organization (for esti- mating national rates of HIV and AIDS) and UNAIDS, and growing interest in using network techniques in determining overall size estimations of hidden populations, in this paper we propose a method of network-based capture-recapture popula-tion estimation that involves only a single sampling round (rather than the two rounds implied by standard capture-re- capture techniques) and which can be used to supplement RDS data collection or more conventional venue based ap- proaches