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We used radio source catalogues accessible from the CATS database to establish radio continuum spectra for decametric radio sources in the UTR-2 catalogue. In an attempt to find further candidates for high-redshift radio galaxies, we searched the FIRST and NVSS surveys for counterparts of a sample of UTR sources with ultra-steep radio spectra (USS, α ≤ −1.2, S ∼vα). We derived accurate positions and sizes for 23 of these USS sources. The search for optical counterparts from the APM (object) anddoi:10.1017/s0074180900168949 fatcat:q3suzgizabfolfxapvdebue7om