Traditional folk as mandated by the 1954 definition is a dinosaur(a veritable T. Rex judging by the responses generated) However the ontogeny of it's bird offspring is keeping the phylum alive. The dinosaurs could not compete in the modern world, they were but one more of evolution's blind alleys, but if you accept the concept that ontogeny recapitulates phylogeny then the genre is beating it;s wings strongly and little eggs are constantly hatching.