We have started a search for High Redshift Radio Galaxies ( HZRGs ) in an area covering 7 sr by selecting a sample of Ultra Steep Spectrum ( USS ) sources with a low flux density cut-off S _ { 1400 } > 10 mJy and a steep spectral index cut-off of \alpha < -1.3 ( S \propto \nu ^ { \alpha } ) from the WENSS , NVSS and TEXAS surveys .
Our first results for 27 sources show that we are almost twice as effective in finding HZRGs than than surveys of relatively bright radio sources with a spectral index cut-off of \alpha < -1.0 .
The redshift distribution is consistent with an extension of the z - \alpha relation to \alpha < -1.3 , but a large fraction of our sample ( 40 % ) consists of objects which are too faint to observe with 3 - 4m class telescopes .
Our search is aimed at increasing the number of very high redshift radio galaxies for further detailed studies of the formation and evolution of massive galaxies and their environment .